Cognitive ageing and dementia

إِنَّمَا مَثَلُ ٱلۡحَيَوٰةِ ٱلدُّنۡيَا كَمَآءٍ أَنزَلۡنَٰهُ مِنَ ٱلسَّمَآءِ فَٱخۡتَلَطَ بِهِۦ نَبَاتُ ٱلۡأَرۡضِ مِمَّا يَأۡكُلُ ٱلنَّاسُ وَٱلۡأَنۡعَٰمُ حَتَّىٰٓ إِذَآ أَخَذَتِ ٱلۡأَرۡضُ زُخۡرُفَهَا وَٱزَّيَّنَتۡ وَظَنَّ أَهۡلُهَآ أَنَّهُمۡ قَٰدِرُونَ عَلَيۡهَآ أَتَىٰهَآ أَمۡرُنَا لَيۡلًا أَوۡ نَهَارࣰ ا فَجَعَلۡنَٰهَا حَصِيدࣰ ا كَأَن لَّمۡ تَغۡنَ بِٱلۡأَمۡسِۚ كَذَٰلِكَ نُفَصِّلُ ٱلۡأٓيَٰتِ لِقَوۡمࣲ يَتَفَكَّرُونَ

The life of this world is like this: rain that We send down from the sky is absorbed by the plants of the earth, from which humans and animals eat. But when the earth has taken on its finest appearance, and adorns itself, and its people think they have power over it, then the fate We commanded comes to it, by night or by day, and We reduce it to stubble, as if it had not flourished just the day before. This is the way We explain the revelations for those who reflect

أَوۡ يَكُونَ لَكَ بَيۡتࣱ مِّن زُخۡرُفٍ أَوۡ تَرۡقَىٰ فِي ٱلسَّمَآءِ وَلَن نُّؤۡمِنَ لِرُقِيِّكَ حَتَّىٰ تُنَزِّلَ عَلَيۡنَا كِتَٰبࣰ ا نَّقۡرَؤُهُۥۗ قُلۡ سُبۡحَانَ رَبِّي هَلۡ كُنتُ إِلَّا بَشَرࣰ ا رَّسُولࣰ ا

or have a house made of gold; or ascend into the sky- even then, we will not believe in your ascension until you send a real book down for us to read.’ Say, ‘Glory be to my Lord! Am I anything but a mortal, a messenger?’

وَزُخۡرُفࣰ اۚ وَإِن كُلُّ ذَٰلِكَ لَمَّا مَتَٰعُ ٱلۡحَيَوٰةِ ٱلدُّنۡيَاۚ وَٱلۡأٓخِرَةُ عِندَ رَبِّكَ لِلۡمُتَّقِينَ

and golden ornaments. All of these are mere enjoyments of this life; your Lord reserves the next life for those who take heed of Him

وَكَذَٰلِكَ جَعَلۡنَا لِكُلِّ نَبِيٍّ عَدُوࣰّ ا شَيَٰطِينَ ٱلۡإِنسِ وَٱلۡجِنِّ يُوحِي بَعۡضُهُمۡ إِلَىٰ بَعۡضࣲ زُخۡرُفَ ٱلۡقَوۡلِ غُرُورࣰ اۚ وَلَوۡ شَآءَ رَبُّكَ مَا فَعَلُوهُۖ فَذَرۡهُمۡ وَمَا يَفۡتَرُونَ

In the same way We assigned to each prophet an enemy, evil humans and evil jinn. They suggest alluring words to one another in order to deceive- if it had been your Lord’s will, [Prophet], they would not have done this: leave them to their inventions

Thus have We made for every prophet an enemy, satans of jinn and men. When someone's rank is higher, his trial will be more complete. When someone is nearer to the Real and his heart more limpid, his soul will be more captured by the hand of the enemy. Yes, without the grief of tribulation, the story of love cannot be told. Without the venom of trial, the honey of friendship cannot be found. Look at what Adam the Chosen, that sapling honored by the Real and nurtured by hallowing, saw from his enemy Iblis. God says, “Then Satan made them slip therefrom and brought them out from what they were in” [2:36]. And that other elder of the prophets and father of the world's folk, Noah-look at what he saw from his own people. For nine hundred and some years he invited them, and every day they beat him so much that he became unconscious, and they advised his own children to be his enemies. That par

The likeness the description of the life of this world is only as water rain which We send down from the heaven then the plants of the earth mingle with it they mingle because of it attaching themselves one to another whereof mankind eat plants such as wheat and barley and so on and cattle eat of pasture until when the earth has taken on its ornaments its splendour of plants and has adorned itself with flowers izzayyanat ‘adorned itself’ is originally tazayyanat but the tā’ has been substituted with the zāy and assimilated with it and its inhabitants think that they are masters of it fully capable of harvesting its fruits Our command Our decree or Our chastisement comes upon it by night or day and We make it that is its crops as reaped corn like that which has been reaped with sickles as though ka-an is softened in other words read it as ka-annahā the previous day it had not flourished a

or until you come to have a house adorned with gold or ascend into the heaven upon a ladder and even then we will not believe your ascension if you were to ascend into it until you bring down for us therefrom a book in which is confirmed your truthfulness that we may read’. Say to them ‘Glory be to my Lord — this is a statement of amazement — Am I anything but a human a messenger from God?’ in other words I am like all other messengers for they never brought any signs except by God’s leave.

And so We have appointed to every Prophet an enemy just as We have appointed these your enemies and this ‘adūwwan ‘an enemy’ is substituted by the following shayātīn ‘devils’ devils the rebels of mankind and jinn who inspire whisper fine speech to each other the falsehood that is disguised as such fine speech in delusion that is in order to delude them; yet had your Lord willed they would never have done it that mutual inspiration. So leave them let the disbelievers be with what they fabricate of disbelief and otherwise of what has been adorned for them — this was revealed before the command to fight them.

Verily, the parable of the life of the world is as the water which We send down from the sky; so by it arises the intermingled produce of the earth of which men and cattle eat: until when the earth is clad in its adornments and is beautified, and its people think that they have all the powers of disposal over it, Our command reaches it by night or by day and We make it like a clean-mown harvest, as if it had not flourished yesterday! Thus do We explain the Ayat in detail for the people who reflect (24)Allah calls to the Abode of Peace (Paradise) and guides whom He wills to the straight path (25) The Parable of this Life Allah the Almighty has set an example of the similitude of the life of this world, its glitter and the swiftness of its passage, likening it to the plant and vegetation that Allah brings out from the earth. This plant grows from the water that comes down from the sky. T

And they say: "We shall not believe in you, until you cause a spring to gush forth from the earth for us; (90)"Or you have a garden of date palms and grapes, and cause rivers to gush forth in their midst abundantly; (91)"Or you cause the heaven to fall upon us in pieces, as you have pretended, or you bring Allah and the angels before (us) face to face; (92)"Or you have a house of Zukhruf, or you ascend up into the sky, and even then we will put no faith in your ascension until you bring down for us a Book that we would read." Say: "Glorified be my Lord! Am I anything but a man, sent as a Messenger? (93) The Demand of Quraysh for a specific Sign, and the Rejection of that Ibn Jarir recorded from Muhammad bin Ishaq, "An old man from among the people of Egypt who came to us forty-odd years ago told me, from 'Ikrimah, from Ibn 'Abbas, that 'Utbah and Shaybah – the two sons of Rabi'ah, Abu

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ عَبْدِ الرَّحْمَنِ الأَعْرَجِ، عَنْ عَبْدِ اللَّهِ ابْنِ بُحَيْنَةَ ـ رضى الله عنه ـ أَنَّهُ قَالَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَامَ مِنِ اثْنَتَيْنِ مِنَ الظُّهْرِ لَمْ يَجْلِسْ بَيْنَهُمَا، فَلَمَّا قَضَى صَلاَتَهُ سَجَدَ سَجْدَتَيْنِ ثُمَّ سَلَّمَ بَعْدَ ذَلِكَ‏.‏

Narrated `Abdullah bin Buhaina:Allah's Messenger (ﷺ) got up after the second rak`a of the Zuhr prayer without sitting in between (the second and the third rak`at). When he finished the prayer he performed two prostrations (of Sahu) and then finished the prayer with Taslim

حَدَّثَنَا أَبُو الْوَلِيدِ، حَدَّثَنَا شُعْبَةُ، عَنِ الْحَكَمِ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم صَلَّى الظُّهْرَ خَمْسًا فَقِيلَ لَهُ أَزِيدَ فِي الصَّلاَةِ فَقَالَ ‏ "‏ وَمَا ذَاكَ ‏"‏‏.‏ قَالَ صَلَّيْتَ خَمْسًا‏.‏ فَسَجَدَ سَجْدَتَيْنِ بَعْدَ مَا سَلَّمَ‏.‏

Narrated' `Abdullah:Once Allah's Messenger (ﷺ) offered five rak`at in the Zuhr prayer, and somebody asked him whether there was some increase in the prayer. Allah's Messenger (ﷺ) said, "What is that?" He said, "You have offered five rak`at." So Allah's Messenger (ﷺ) performed two prostrations of Sahu after Taslim

أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، قَالَ حَدَّثَنَا غَيْلاَنُ بْنُ جَرِيرٍ، عَنْ مُطَرِّفِ بْنِ عَبْدِ اللَّهِ، قَالَ صَلَّى عَلِيُّ بْنُ أَبِي طَالِبٍ فَكَانَ يُكَبِّرُ فِي كُلِّ خَفْضٍ وَرَفْعٍ يُتِمُّ التَّكْبِيرَ ‏.‏ فَقَالَ عِمْرَانُ بْنُ حُصَيْنٍ لَقَدْ ذَكَّرَنِي هَذَا صَلاَةَ رَسُولِ اللَّهِ صلى الله عليه وسلم ‏.‏

It was narrated that Mutarrif bin 'Abdullah said:"Ali bin Abi Talib prayed, and he said the takbir every time he went down and came up, in all movements of the prayer. 'Imran bin Husain said: 'This reminds me of the prayer of the Messenger of Allah (ﷺ)

أَخْبَرَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ الدَّوْرَقِيُّ، وَمُحَمَّدُ بْنُ بَشَّارٍ، - وَاللَّفْظُ لَهُ - قَالاَ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا عَبْدُ الْحَمِيدِ بْنُ جَعْفَرٍ، قَالَ حَدَّثَنِي مُحَمَّدُ بْنُ عَمْرِو بْنِ عَطَاءٍ، عَنْ أَبِي حُمَيْدٍ السَّاعِدِيِّ، قَالَ سَمِعْتُهُ يُحَدِّثُ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم إِذَا قَامَ مِنَ السَّجْدَتَيْنِ كَبَّرَ وَرَفَعَ يَدَيْهِ حَتَّى يُحَاذِيَ بِهِمَا مَنْكِبَيْهِ كَمَا صَنَعَ حِينَ افْتَتَحَ الصَّلاَةَ ‏.‏

It was narrated from Abu Humaid As-Sa'idi that:When the Prophet (ﷺ) stood up following two prostrations, he would say the takbir and raise his hands until they were level with his shoulders, as he had done at the beginning of the prayer

وبيان درجاته وبيان أقسام المخاوف وبيان فضيلة الخوف وبيان الأفضل من الخرف والرجاء وبيان دواء الخوف وبيان معنى سوء الخاتمة وبيان أحوال الخائفين من الأنبياء صلوات الله عليهم والصالحين رحمة الله عليهم ونسأل الله حسن التوفيق بيان حقيقة الخوف

فلا أحسن من هذه النصيحة وهذا الإرشاد والتعليم الذي لو أخذ به الناس لم يضع في الأكثر حق أحد ولم يتمكن المبطل من الجحود والنسيان

قالوا وكيف يظن بالشرع أنه يخفف عن هذا المتعمد المفرط العاصي لله ورسوله بترك الوجوب ويوجبه على المعذور بالنوم أو النسيان

| فصل قال : والذكر : هو التلخص من الغفلة والنسيان والفرق بين الغفلة

وصرح هؤلاء : أن التوكل والدعاء عبودية محضة لا فائدة لهما إلا ذلك ولو ترك العبد التوكل والدعاء ما فاته شيء مما قدر له ومن غلاتهم من يجعل الدعاء بعدم المؤاخذة على الخطإ والنسيان عديم الفائدة إذ هو مضمون الحصول

وأنشدني المنتصر بن بلال الأنصاري % الرفق ممن سيلقى اليمن صاحبه % والخرف منه يكون العنف والزلل % % والحزم أن يتأنى المرء فرصته % والكف عنها إذا ما أمكنت فشل % % والبر لله خير الأمر عاقبة % والله للبر عون ماله مثل % % خير البريه قولا خيرهم عملا % لا يصلح القول حتى يصلح العمل % $

The role of the Mediterranean diet in reducing the risk of cognitive impairement, dementia, and Alzheimer's disease: a meta-analysis.: Age-related cognitive impairment and dementia pose a significant global health, social, and economic challenge. While Alzheimer's disease (AD) has historically been viewed as the leading cause of dementia, recent evidence reveals the considerable impact of vascular cognitive impairment and dementia (VCID), which now accounts for nearly half of all dementia cases. The Mediterranean diet-characterized by high consumption of fruits, vegetables, whole grains, fish, and olive oil-has been widely reco

Sleep disorders increase the risk of dementia, Alzheimer's disease, and cognitive decline: a meta-analysis.: Sleep disorders, particularly insomnia and obstructive sleep apnea, are increasingly implicated as significant contributors to cognitive decline, dementia, and neurodegenerative diseases such as Alzheimer's disease (AD) and vascular cognitive impairment and dementia (VCID). However, the extent and specificity of these associations remain uncertain. This meta-analysis evaluates the impact of common sleep disorders on the risk of developing dementia and cognitive decline. A comprehensive search of

Modifiable predictors of dementia in mild cognitive impairment: a systematic review and meta-analysis.: Objective: Public health campaigns encouraging early help seeking have increased rates of mild cognitive impairment (MCI) diagnosis in Western countries, but we know little about how to treat or predict dementia outcomes in persons with the condition. Method: The authors searched electronic databases and references for longitudinal studies reporting potentially modifiable risk factors for incident dementia after MCI. Two authors independently evaluated study quality using a checklist. Meta-analy

Dietary Intake, Mediterranean and Nordic Diet Adherence in Alzheimer's Disease and Dementia: A Systematic Review.: Background/objectives: Dementia is not a single disease but an umbrella term that encompasses a range of symptoms, such as memory loss and cognitive impairments, which are severe enough to disrupt daily life. One of the most common forms of dementia is Alzheimer's Disease (AD), a complex neurodegenerative condition influenced by both genetic and environmental factors. Recent research has highlighted diet as a potential modifiable risk factor for AD. Decades of research have explored the role of

Technology-enhanced multi-domain at home continuum of care program with respect to usual care for people with cognitive impairment: the Ability-TelerehABILITation study protocol for a randomized controlled trial.: Background: According to the World Alzheimer Report (Prince, The Global Impact of Dementia: an Analysis of Prevalence, Incidence, Cost and Trends, 2015), 46.8 million people worldwide are nowadays living with dementia. And this number is estimated to approximate 131.5 million by 2050, with an increasing burden on society and families. The lack of medical treatments able to stop or slow down the course of the disease has moved the focus of interest toward the nonpharmacological approach and psych

Physical exercise attenuates cognitive decline and reduces behavioural problems in people with mild cognitive impairment and dementia: a systematic review.: Questions: What is the effect of physical exercise on cognitive decline and behavioural problems in people with mild cognitive impairment (MCI) or dementia? What is the effect of physical exercise on particular domains of cognitive function? How do training protocols and patients' characteristics influence the outcomes? Design: Systematic review and meta-analysis of randomised trials. Participants: People with MCI or dementia as their primary diagnosis. Intervention: Physical exercise. Outcome m

Consumption of grape seed extract prevents amyloid-beta deposition and attenuates inflammation in brain of an Alzheimer's disease mouse.

Polyphenols extracted from grape seeds are able to inhibit amyloid-beta (Abeta) aggregation, reduce Abeta production and protect against Abeta neurotoxicity in vitro. We aimed to investigate the therapeutic effects of a polyphenol-rich grape seed extract (GSE) in Alzheimer's disease (AD) mice. APP(Swe)/PS1dE9 transgenic mice were fed with normal AIN-93G diet (control diet), AIN-93G diet with 0.07% curcumin or diet with 2% GSE beginning at 3 months of age for 9 months. Total phenolic content of GSE was 592.5 mg/g dry weight, including gallic acid (49 mg/g), catechin (41 mg/g), epicatechin (66 mg/g) and proanthocyanidins (436.6 mg catechin equivalents/g). Long-term feeding of GSE diet was well tolerated without fatality, behavioural abnormality, changes in food consumption, body weight or liver function. The Abeta levels in the brain and serum of the mice fed with GSE were reduced by 33% a…

matched on Alzheimer Disease (mesh), Amyloid beta-Peptides (mesh)

Acute Inflammation Alters Brain Energy Metabolism in Mice and Humans: Role in Suppressed Spontaneous Activity, Impaired Cognition, and Delirium.

Systemic infection triggers a spectrum of metabolic and behavioral changes, collectively termed sickness behavior, which while adaptive, can affect mood and cognition. In vulnerable individuals, acute illness can also produce profound, maladaptive, cognitive dysfunction including delirium, but our understanding of delirium pathophysiology remains limited. Here, we used bacterial lipopolysaccharide (LPS) in female C57BL/6J mice and acute hip fracture in humans to address whether disrupted energy metabolism contributes to inflammation-induced behavioral and cognitive changes. LPS (250 µg/kg) induced hypoglycemia, which was mimicked by interleukin (IL)-1β (25 µg/kg) but not prevented in IL-1RI-/- mice, nor by IL-1 receptor antagonist (IL-1RA; 10 mg/kg). LPS suppression of locomotor activity correlated with blood glucose concentrations, was mitigated by exogenous glucose (2 g/kg), and was ex…

matched on Cognitive Dysfunction (mesh), Dementia (keyword)

Loneliness interacts with family relationship in relation to cognitive function in Chinese older adults.

ABSTRACTObjectives:Loneliness and social networks have been extensively studied in relation to cognitive impairments, but how they interact with each other in relation to cognition is still unclear. This study aimed at exploring the interaction of loneliness and various types of social networks in relation to cognition in older adults. Design: a cross-sectional study. Setting: face-to-face interview. Participants: 497 older adults with normal global cognition were interviewed. Measurements: Loneliness was assessed with Chinese 6-item De Jong Gierverg's Loneliness Scale. Confiding network was defined as people who could share inner feelings with, whereas non-confiding network was computed by subtracting the confiding network from the total network size. Cognitive performance was expressed as a global composite z-score of Cantonese version of mini mental state examination (CMMSE), Categori…

matched on Cognitive Dysfunction (mesh), Dementia (keyword)

The impact of tooth loss on cognitive function.

Objective: To investigate if there is epidemiological evidence of an association between edentulism and cognitive decline beside that currently available from limited sample-sized case series and cross-sectional studies considering limited co-variables. Materials and methods: Data from two USA national health surveys [NHIS 2014-2017 and NHANES 2005-2018] were analyzed using multinomial logistic regression to study the impact of type of edentulism and number of remaining teeth on memory and concentration problems. Age, gender, socioeconomic status, education level, cardiovascular health index, body mass index, exercise, alcohol, smoking habits, and anxiety and depression were used as covariates. Results: The combined population sample was 102,291 individuals. Age, socioeconomic status, educational level, anxiety and depression levels, and edentulism showed the highest odds ratios for cogn…

matched on Dementia (keyword), Cognitive Dysfunction (keyword), cognitive decline (text)

Machine learning approach for early onset dementia neurobiomarker using EEG network topology features.

Introduction: Modern neurotechnology research employing state-of-the-art machine learning algorithms within the so-called "AI for social good" domain contributes to improving the well-being of individuals with a disability. Using digital health technologies, home-based self-diagnostics, or cognitive decline managing approaches with neuro-biomarker feedback may be helpful for older adults to remain independent and improve their wellbeing. We report research results on early-onset dementia neuro-biomarkers to scrutinize cognitive-behavioral intervention management and digital non-pharmacological therapies. Methods: We present an empirical task in the EEG-based passive brain-computer interface application framework to assess working memory decline for forecasting a mild cognitive impairment. The EEG responses are analyzed in a framework of a network neuroscience technique applied to EEG tim…

matched on Dementia (keyword), cognitive decline (text), mild cognitive impairment (text)

The Aerobic and Cognitive Exercise Study (ACES) for Community-Dwelling Older Adults With or At-Risk for Mild Cognitive Impairment (MCI): Neuropsychological, Neurobiological and Neuroimaging Outcomes of a Randomized Clinical Trial.

Prior research has found that cognitive benefits of physical exercise and brain health in older adults may be enhanced when mental exercise is interactive simultaneously, as in exergaming. It is unclear whether the cognitive benefit can be maximized by increasing the degree of mental challenge during exercise. This randomized clinical trial (RCT), the Aerobic and Cognitive Exercise Study (ACES) sought to replicate and extend prior findings of added cognitive benefit from exergaming to those with or at risk for mild cognitive impairment (MCI). ACES compares the effects of 6 months of an exer-tour (virtual reality bike rides) with the effects of a more effortful exer-score (pedaling through a videogame to score points). Fourteen community-dwelling older adults meeting screening criteria for MCI (sMCI) were adherent to their assigned exercise for 6 months. The primary outcome was executive …

matched on Dementia (keyword), cognitive decline (text), mild cognitive impairment (text)

Cognitive function with changing hormonal milieu across menopausal transition stages and related symptoms in midlife and beyond.

The menopausal transition is regarded as the critical window where midlife women experience various health challenges having debilitating impact on their wellbeing. The present cross-sectional study intends to assess cognitive outcome with changing hormonal milieu during menopausal transition and related symptoms in midlife and beyond. For this purpose, cognitive performance of women and menopausal symptoms were studied on the sample of 320 women ranging in age from 45 to 60 years. Data collection was carried out by purposive sampling method from rural areas of Haryana from March 2021 to January 2023. Findings of the study demonstrated a successive downward trend in the mean scores of orientation to time and place, registration, attention, recall, as well as language and visual spatial skills cognitive domain from premenopause to late postmenopause stage. Multivariate logistic regression…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Immunometabolic biomarkers of brain aging: Nonlinear association between neutrophil-to-HDL cholesterol ratio and cognitive decline in older adults.

Background: Immune dysregulation and metabolic disturbances contribute to cognitive decline in aging populations. The neutrophil-to-HDL cholesterol ratio (NHR), an emerging immunometabolic biomarker, reflects systemic inflammation and vascular dysfunction. However, its role in predicting cognitive impairment in older adults remains unclear. This study examined the association between NHR and cognitive impairment, explored non-linear patterns, and compared its predictive performance with conventional biomarkers. Study design and method: A total of 2,355 adults aged ≥ 60 years underwent cognitive assessment using standardized neuropsychological tests. Logistic regression evaluated the association between NHR and cognitive impairment, adjusting for demographic, clinical, and lifestyle factors. Restricted cubic splines (RCS) assessed non-linear relationships. Predictive performance was compa…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Cognitive and psychiatric symptom trajectories 2-3 years after hospital admission for COVID-19: a longitudinal, prospective cohort study in the UK.

Background: COVID-19 is known to be associated with increased risks of cognitive and psychiatric outcomes after the acute phase of disease. We aimed to assess whether these symptoms can emerge or persist more than 1 year after hospitalisation for COVID-19, to identify which early aspects of COVID-19 illness predict longer-term symptoms, and to establish how these symptoms relate to occupational functioning. Methods: The Post-hospitalisation COVID-19 study (PHOSP-COVID) is a prospective, longitudinal cohort study of adults (aged ≥18 years) who were hospitalised with a clinical diagnosis of COVID-19 at participating National Health Service hospitals across the UK. In the C-Fog study, a subset of PHOSP-COVID participants who consented to be recontacted for other research were invited to complete a computerised cognitive assessment and clinical scales between 2 years and 3 years after hospit…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Causal relationship between sleep traits and cognitive impairment: A Mendelian randomization study.

Objective: Observational studies had demonstrated a link between sleep disturbances and cognitive decline. Here, we aimed to investigate the causal association between genetically predicted sleep traits and cognitive impairment using Mendelian randomization (MR). Methods: Using strict criteria, we selected genetic variants from European ancestry Genome-wide association studies (GWAS) from the Sleep Disorders Knowledge Portal and UK Biobank as instrumental variables for several sleep traits, including insomnia, sleep duration, daytime sleepiness, daytime napping, and chronotype. Summary statistics related to cognitive impairment were derived from five different GWAS, including the Social Science Genetic Association Consortium. The role of self-reported sleep trait phenotypes in the etiology of cognitive impairment was explored using inverse-variance weighted (IVW) tests, MR-Egger tests, a…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Platelet factors attenuate inflammation and rescue cognition in ageing.

Identifying therapeutics to delay, and potentially reverse, age-related cognitive decline is critical in light of the increased incidence of dementia-related disorders forecasted in the growing older population1. Here we show that platelet factors transfer the benefits of young blood to the ageing brain. Systemic exposure of aged male mice to a fraction of blood plasma from young mice containing platelets decreased neuroinflammation in the hippocampus at the transcriptional and cellular level and ameliorated hippocampal-dependent cognitive impairments. Circulating levels of the platelet-derived chemokine platelet factor 4 (PF4) (also known as CXCL4) were elevated in blood plasma preparations of young mice and humans relative to older individuals. Systemic administration of exogenous PF4 attenuated age-related hippocampal neuroinflammation, elicited synaptic-plasticity-related molecular c…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Lived experience of neuropsychiatric symptoms among females with mild cognitive impairment: A phenomenological study.

Aims: To explore the lived experience of neuropsychiatric symptoms (NPS) among females with mild cognitive impairment (MCI). Design: A phenomenological study using individual, semi-structured, telephone-based interviews was conducted to explore how the NPS are aroused, evolve, and affect the overall well-being, illness perception and the corresponding coping responses adopted by females with MCI. Methods: Twenty-nine participants with MCI were recruited from the community setting in Hong Kong between March and October 2020. Interviews were audio-recorded, transcribed verbatim, and analysed using an interpretative phenomenological analysis approach and constant comparison strategy. Results: Three themes were identified: (1) living vigilant lives with threats and uncertainty, (2) snowballing into further negative emotions and (3) seeking outlets for negative emotions. Our findings suggeste…

matched on Cognitive Dysfunction (mesh), mild cognitive impairment (text)

Cognitive decline and poor social relationship in older adults during COVID-19 pandemic: can information and communications technology (ICT) use helps?

Background: To answer whether older adults' cognitive function benefits from ICT use, we (1) examined the relationship between ICT use and cognitive decline during the COVID-19 pandemic and (2) explored the potential role of ICT use in mitigating the relationship between loneliness, social isolation, and cognitive decline among community-dwelling older adults. Methods: From February to March 2021, a mail survey was distributed to 1,400 older adults aged 70-89 years old. Responded participants were 1,003 (71.6% response rate). Subjective cognitive decline (SCD) was the independent variable. ICT use was assessed based on ICT use history and current ICT use activities. Loneliness was based on the Japanese version of the Three-Item Loneliness Scale. Social isolation was a total score of six items. Covariate-adjusted logistic regressions were performed and stratified by age groups (70-79 and …

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Cognitive Outcome 1 Year After Mild Traumatic Brain Injury: Results From the TRACK-TBI Study.

Background and objectives: The objectives of this study were to develop and establish concurrent validity of a clinically relevant definition of poor cognitive outcome 1 year after mild traumatic brain injury (mTBI), to compare baseline characteristics across cognitive outcome groups, and to determine whether poor 1-year cognitive outcome can be predicted by routinely available baseline clinical variables. Methods: Prospective cohort study included 656 participants ≥17 years of age presenting to level 1 trauma centers within 24 hours of mTBI (Glasgow Coma Scale score 13-15) and 156 demographically similar healthy controls enrolled in the Transforming Research and Clinical Knowledge in TBI (TRACK-TBI) study. Poor 1-year cognitive outcome was defined as cognitive impairment (below the ninth percentile of normative data on ≥2 cognitive tests), cognitive decline (change score [1-year score m…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

CX3C-chemokine receptor 1 modulates cognitive dysfunction induced by sleep deprivation.

Background: Microglia plays an indispensable role in the pathological process of sleep deprivation (SD). Here, the potential role of microglial CX3C-chemokine receptor 1 (CX3CR1) in modulating the cognition decline during SD was evaluated in terms of microglial neuroinflammation and synaptic pruning. In this study, we aimed to investigat whether the interference in the microglial function by the CX3CR1 knockout affects the CNS's response to SD. Methods: Middle-aged wild-type (WT) C57BL/6 and CX3CR1-/- mice were either subjected to SD or allowed normal sleep (S) for 8 h to mimic the pathophysiological changes of middle-aged people after staying up all night. After which, behavioral and histological tests were used to explore their different changes. Results: CX3CR1 deficiency prevented SD-induced cognitive impairments, unlike WT groups. Compared with the CX3CR1-/- S group, the CX3CR1-/- S…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

A fiber-deprived diet causes cognitive impairment and hippocampal microglia-mediated synaptic loss through the gut microbiota and metabolites.

Background: Cognitive impairment, an increasing mental health issue, is a core feature of the aging brain and neurodegenerative diseases. Industrialized nations especially, have experienced a marked decrease in dietary fiber intake, but the potential mechanism linking low fiber intake and cognitive impairment is poorly understood. Emerging research reported that the diversity of gut microbiota in Western populations is significantly reduced. However, it is unknown whether a fiber-deficient diet (which alters gut microbiota) could impair cognition and brain functional elements through the gut-brain axis. Results: In this study, a mouse model of long-term (15 weeks) dietary fiber deficiency (FD) was used to mimic a sustained low fiber intake in humans. We found that FD mice showed impaired cognition, including deficits in object location memory, temporal order memory, and the ability to pe…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Midlife Marital Dissolution and the Onset of Cognitive Impairment.

Background and objectives: Marital dissolution has become more common in midlife with the doubling of the divorce rate among middle-aged adults. Guided by the stress model that stipulates losing economic, social, and psychological resources lowers well-being, we posited that midlife adults who experienced divorce or widowhood were at greater risk of cognitive impairment than the continuously married. Subsequent repartnering was expected to negate the increased risk. Research design and methods: We used data from the 1998-2016 Health and Retirement Study to estimate discrete-time event history models using logistic regression to predict cognitive impairment onset for men and women. Results: Roughly 27% of men who experienced spousal death in midlife went on to experience mild cognitive impairment by age 65. For women, experiencing divorce or widowhood was associated with higher odds of co…

matched on Cognitive Dysfunction (mesh), mild cognitive impairment (text)

Mediterranean diet adherence is associated with better cognitive status and less depressive symptoms in a Greek elderly population.

Purpose: To evaluate the Mediterranean diet (MD) adherence of an elderly Greek population, and its association with the grade of cognitive decline and psychological status. Methods: Mini-Mental State Examination (MMSE), Geriatric Depression Scale (GDS), and Mediterranean diet score (MedDietScore) questionnaires were used to assess the impact of MD adherence on cognitive abilities and psychological state of a Greek elderly population. Participants: 2092 men and women over 65 years old (mean age 74.97 ± 8.41 years) from seven different Greek cities RESULTS: 34.4% of the study population showed cognitive impairment, while 32.3% of the participants had depressive symptoms. More than half of the participants (52.1%) showed very low or low MD adherence. Higher MD adherence was significantly associated with better MMSE and GDS scores. Moreover, higher MD adherence was significantly associated w…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Neuroblast senescence in the aged brain augments natural killer cell cytotoxicity leading to impaired neurogenesis and cognition.

Normal aging is accompanied by escalating systemic inflammation. Yet the potential impact of immune homeostasis on neurogenesis and cognitive decline during brain aging have not been previously addressed. Here we report that natural killer (NK) cells of the innate immune system reside in the dentate gyrus neurogenic niche of aged brains in humans and mice. In situ expansion of these cells contributes to their abundance, which dramatically exceeds that of other immune subsets. Neuroblasts within the aged dentate gyrus display a senescence-associated secretory phenotype and reinforce NK cell activities and surveillance functions, which result in NK cell elimination of aged neuroblasts. Genetic or antibody-mediated depletion of NK cells leads to sustained improvements in neurogenesis and cognitive function during normal aging. These results demonstrate that NK cell accumulation in the aging…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Health Factors as Potential Mediators of the Longitudinal Effect of Loneliness on General Cognitive Ability.

Objective: Higher levels of loneliness in older adulthood predict cognitive decline, but research on mediating mechanisms is sparse. We examine multisystemic physiological risk, functional ability, self-rated health, depressive symptoms, and social participation as mediating processes for the association between loneliness and general cognitive ability over a 10-year follow-up in an older adult sample. Methods: Three waves of data from 3,005 individuals (mean intake age: 69.30 (SD: 7.85) years; female = 51.61%) recruited during Wave 1 of the National Social Life, Health, and Aging Project were used to test whether hypothesized mediators collected at the 5-year follow-up explained effects of baseline loneliness on 10-year general cognitive ability. Results: The relationship between baseline loneliness and 10-year general cognitive ability was not mediated by multisystemic physiological ri…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Intermittent Fasting Enhanced the Cognitive Function in Older Adults with Mild Cognitive Impairment by Inducing Biochemical and Metabolic changes: A 3-Year Progressive Study.

Intermittent fasting (IF) refers to various dietary regimens that cycle between a period of non-fasting and a period of total fasting. This study aimed to determine the effects of IF on cognitive function among elderly individuals who practice IF who have mild cognitive impairment (MCI). A total of 99 elderly subjects with MCI of Malay ethnicity without any terminal illness were recruited from a larger cohort study, LRGS TUA. The subjects were divided into three groups, comprising those who were regularly practicing IF (r-IF), irregularly practicing IF (i-IF), and non-fasters (n-IF). Upon 36 months of follow-up, more MCI subjects in the r-IF group reverted to successful aging with no cognitive impairment and diseases (24.3%) compared to those in i-IF (14.2%) and n-IF groups (3.7%). The r-IF group's subjects exhibited significant increment in superoxide dismutase (SOD) activity and reduct…

matched on Cognitive Dysfunction (mesh), mild cognitive impairment (text)

Community-level social capital and cognitive decline after a natural disaster: A natural experiment from the 2011 Great East Japan Earthquake and Tsunami.

We examined prospectively whether community-level social capital can mitigate the adverse effects of natural disaster on cognitive decline in the aftermath of the 2011 Great East Japan Earthquake and Tsunami. The baseline for our natural experimental study was established seven months before the disaster in a survey of older community-dwelling adults who lived in Iwanuma City, Japan, located 80 km west of the epicenter. Two and a half years after the disaster, we conducted a follow-up survey of survivors to gather information about their personal experiences during the disaster (n = 3560; 82.1% follow-up rate). Our primary outcome was the level of cognitive disability (measured on an 8-level scale) assessed within people's homes. Factor analysis established two subscales of community social capital: a cognitive dimension (perceptions of community social cohesion) and a structural dimensi…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Gut microbiota mediates intermittent-fasting alleviation of diabetes-induced cognitive impairment.

Cognitive decline is one of the complications of type 2 diabetes (T2D). Intermittent fasting (IF) is a promising dietary intervention for alleviating T2D symptoms, but its protective effect on diabetes-driven cognitive dysfunction remains elusive. Here, we find that a 28-day IF regimen for diabetic mice improves behavioral impairment via a microbiota-metabolites-brain axis: IF enhances mitochondrial biogenesis and energy metabolism gene expression in hippocampus, re-structures the gut microbiota, and improves microbial metabolites that are related to cognitive function. Moreover, strong connections are observed between IF affected genes, microbiota and metabolites, as assessed by integrative modelling. Removing gut microbiota with antibiotics partly abolishes the neuroprotective effects of IF. Administration of 3-indolepropionic acid, serotonin, short chain fatty acids or tauroursodeoxyc…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Modulation of neuroinflammation and memory dysfunction using percutaneous vagus nerve stimulation in mice.

Background: The vagus nerve is involved in regulating immunity and resolving inflammation. Current strategies aimed at modulating neuroinflammation and cognitive decline, in many cases, are limited and ineffective. Objective: We sought to develop a minimally invasive, targeted, vagus nerve stimulation approach (pVNS), and we tested its efficacy with respect to microglial activation and amelioration of cognitive dysfunction following lipopolysaccharide (LPS) endotoxemia in mice. Methods: We stimulated the cervical vagus nerve in mice using an ultrasound-guided needle electrode under sevoflurane anesthesia. The concentric bipolar needle electrode was percutaneously placed adjacent to the carotid sheath and stimulation was verified in real-time using bradycardia as a biomarker. Activation of vagal fibers was confirmed with immunostaining in relevant brainstem structures, including the dorsa…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)

Prospective association between sleep-related factors and the trajectories of cognitive performance in the elderly Chinese population across a 5-year period cohort study.

The integral role of sleep in cognition, such as night-time sleep and napping duration, has yielded mixed findings, especially in healthy elderly adults. This study aimed to identify the heterogeneous classes of the cognitive trajectories and investigated the associations between sleep parameters and the trajectories of cognition in different elderly subpopulations. The study was based on a large, national representative sample aged 60 years or older. Two cognitive measures were assessed, including executive function and episodic memory. Sleep parameters were evaluated, including post-lunch napping, night-time sleep duration, and sleep disturbances. Latent growth mixture model (LGMM) was used to describe the trajectories of cognition and investigate the effects of sleep factors on cognition. Three heterogeneous trajectories were identified for executive cognition and four for episodic me…

matched on Cognitive Dysfunction (mesh), cognitive decline (text)