All articles tagged with #dementia
Experts say chronic sleep disturbances—such as reduced deep sleep, circadian rhythm disruption, REM sleep behavior disorder, and nighttime wandering—may be early signs of dementia. Sleep helps clear brain toxins and supports memory consolidation, so persistent or severe sleep problems should prompt evaluation by a neurologist or sleep specialist.
A large multiethnic study of about 93,000 adults found that higher-quality plant-based diets are linked to lower dementia risk: those eating more plant foods had about 12% lower risk, while those following a healthy plant-based pattern had about 7% lower risk; conversely, unhealthy plant-based eating raised risk. Importantly, changing to a healthier plant-based diet over 10 years reduced dementia risk by 11% (shifting toward unhealthy patterns increased risk by 25%). Benefits appeared even in people over 60 at baseline, suggesting late-life dietary improvements can help. The study is observational, so it shows associations, not causation, and researchers call for interventional trials to confirm causality.
Health experts say some language changes are normal with ageing (slower speech, occasional word-finding pauses), but dementia more typically causes loss of words and meanings, vaguer wording, and reduced coherence years before symptoms. There is no single diagnostic test yet; however, advances in language-analysis tools and apps may help flag risk earlier to enable timely intervention.
A decade-long Framingham Heart Study analysis using MRI scans of 1,647 adults found that higher intake of whole grains (like oats and brown rice) and cheese was associated with faster gray-matter decline, while berries and poultry were linked to slower decline. Although the MIND diet has previously shown dementia risk reductions with long-term adherence, these results suggest the relationship between diet and brain aging is more nuanced and calls for more research to understand which foods help or harm brain health.
A UK Biobank analysis found that spending at least 4% of weekly time in vigorous, breathless activity lowered risks of eight chronic diseases (including dementia and type 2 diabetes) and reduced overall mortality over seven years; intensity mattered more than total activity, and even roughly 15–20 minutes per week of such effort added to daily life (stairs, brisk walking, active play) was linked to meaningful health benefits.
Two-year-old Leni Forrester’s Sanfilippo syndrome progression could be halted by a US clinical trial, but UK funding is lacking. Her parents are urging government support and newborn screening expansion while raising funds (the trial costs about £5.5m) to access the treatment before irreversible brain damage and loss of mobility or speech occur.
NIH-funded follow-up of the ACTIVE trial shows that speed-of-processing cognitive training in adults 65+ reduced dementia risk for up to 20 years, with the greatest benefit when booster sessions were included. About 40% of participants who received boosters developed dementia vs 49% in controls, a 25% lower risk; memory and reasoning trainings did not show the same long-term protection. The training’s adaptive, implicit-learning approach—focusing on rapid visual processing—may underlie the effect and could complement other brain-healthy lifestyle strategies, though more research is needed to understand mechanisms and broader public-health impact.
UC San Diego researchers identify plasma phosphorylated tau 217 (p-tau217) as a blood biomarker that predicted future dementia risk decades before symptoms, especially in older women and APOE ε4 carriers; its predictive power varies with age and hormone therapy history, suggesting potential for earlier prevention and monitoring, though not yet ready for routine clinical use.
A Finnish study of over 65,000 dementia patients found that certain infections, notably cystitis and other bacterial infections treated in hospital, occurred years before dementia and were associated with about a 19% higher rate of late-onset dementia. Even after adjusting for other pre-diagnosis diseases, the link persisted, suggesting severe infections may accelerate cognitive decline, typically appearing about 5 to 6.5 years before diagnosis. The study is observational and cannot prove causation; authors note vaccination and infection prevention might help, but intervention trials are needed.
A Rush University study linked sustained cognitive engagement across life (reading, learning new things, puzzles, etc.) with a lower risk of Alzheimer's disease (about 38%) and a slower progression of mild cognitive decline (about 36%), suggesting cognitive enrichment builds brain reserve and resilience, though it stops short of proving causation.
Dementia is an umbrella term with over 100 forms; while Alzheimer’s is the most common, about 40% of cases are rarer types that can be harder to diagnose and require different care. The article highlights four lesser-known subtypes: Posterior cortical atrophy (PCA), which affects visual/spatial function; Creutzfeldt-Jakob disease, a rare prion dementia that progresses rapidly and impacts memory and movement; FTD-MND (frontotemporal dementia with motor neuron disease), where dementia co-occurs with motor symptoms; and Progressive supranuclear palsy (PSP), a movement-related dementia that complicates diagnosis. Early recognition and subtype-specific care are crucial since signs extend beyond memory to vision, movement, language, and behavior.
A Swedish study of over 20,000 adults aged 35–64 found that mentally active sedentary activities (such as reading, solving puzzles, or learning a new skill) were associated with a lower risk of developing dementia, while mentally passive sitting (e.g., watching TV) showed no protective effect and may increase risk. Replacing passive sitting with mentally engaging activities or light physical activity could modestly reduce dementia risk, though the study is observational and cannot prove causation; replication is needed before guiding guidelines.
A Swedish observational study found that adults over 60 with APOE3/4 or APOE4/4 genotypes who consumed more unprocessed meat had slower cognitive decline and a lower risk of dementia, compared with those eating less meat; processed meat was associated with higher risk. The study does not prove causation and intervention studies are needed.
A Finnish nationwide registry study of 62,555 dementia patients and 312,772 controls found two severe infections—cystitis and a bacterial infection of an unspecified site—were linked to higher dementia risk years before diagnosis, with infections appearing to independently raise risk even after accounting for other dementia-related diseases; the study is observational, and generalizability may be limited.
A new Science China Life Sciences review argues that Alzheimer’s arises from a complex network of factors—amyloid and Tau pathology, genetics, aging, and systemic health—making single-target drugs insufficient. The authors urge a holistic strategy that tackles multiple disease pathways, including Tau and aging-related changes, genetic risk, and gut-brain interactions, while leveraging tools like iPSC-derived organoids, CRISPR, and early biomarkers (e.g., plasma pTau217) to guide precision therapies and possibly delay or prevent progression.