All articles tagged with #cognition
A Washington Post Well+Being report suggests that a brief, easy 10‑minute run can improve thinking skills and mood, indicating that short, low‑effort workouts may still benefit brain health without feeling taxing.
A longitudinal study of 502 children followed from age 1 to 8 found that greater screen viewing, especially at age 1 and around the start of school (age 6), is linked to poorer academic performance by age 9 and weaker working memory by age 10.5. Timing matters: associations were weaker at ages 2–3 but re-emerged at 6, suggesting infancy and early schooling may be sensitive windows. Reducing screen time during these periods could help cognitive development, though content quality, device type, and parental co-viewing warrant further study.
Decades of research link long TV viewing to poorer executive function and processing speed, higher dementia risk, and reduced gray matter in key brain regions, with sleep disruption as a possible factor; though causation isn’t proven and no universal safe limit exists, concerns generally rise around 2–4+ hours daily, especially for those with family history.
MIT researchers propose that traveling brain waves coordinate mixed-selectivity neural networks to perform fast, parallel analog computations, providing a mechanism for cognition and consciousness beyond static circuits; alpha/beta waves guide gamma processing and ephaptic coupling enables rapid neural coordination, suggesting wave dynamics could inform noninvasive therapies.
A decade-long PANIC study in Finland followed about 260 children from ages 6–8 to mid-teens, tracking movement and screen use and then testing learning and working memory. Contrary to the expectation that more screen time harms minds, teens with higher cumulative screen time performed better on cognitive tests. The researchers stress this is observational and shows associations, not causation; the quality and active engagement of screen use (puzzles, problem solving, learning) likely matter more than hours alone. The study also found sex- and activity-related differences and underscores the importance of movement, calling for intervention studies to clarify causal effects.
Educators warn that heavy use of AI to complete essays may dull critical thinking and cognitive skills, citing MIT research showing lower brain activity when writing with AI and broader debates on outsourcing thinking. Schools are grappling with policies—some returning to pencil-and-paper tasks or banning devices—while elite institutions reassess honor-code practices. A potential silver lining is students realizing that relying on AI can deprive them of meaningful learning and intellectual growth.
Generative AI can draft polished reports but often hides flaws and fabricated citations; studies show widespread AI use with little training, yet even top AI agents fail on most projects. The author argues for a human-centered approach: set realistic timeframes, pause AI during brainstorming, and foster critical evaluation to preserve thinking and prevent ‘work slop’.
A cross‑sectional study of 894 adults aged 65+ in Germany found that mild, non‑pathological action tremor (measured by Archimedes spiral rating) is linked to lower cognitive performance (TICS‑m). After adjusting for age, sex, frailty, sleep, stroke history, and Parkinson score, each 1‑point increase in tremor severity corresponded to about a 0.63‑point drop in TICS‑m, with the association remaining significant across several sensitivity analyses. Beta‑blocker use did not modify the relationship. Other predictors of poorer cognition included older age, male sex, frailty, and higher Parkinson score. Limitations include the cross‑sectional design and tremor assessment via a single spiral drawing. Authors suggest aging‑related brain changes could underlie both tremor and cognitive decline.
A study published in Nutrients analyzed 890 adults over 55 from the Rancho Bernardo cohort and found women who ate eggs more than five times a week showed less decline in fluency and executive function over time, suggesting egg-borne nutrients like choline, vitamin B12, lutein and high-quality protein may support brain health. While the association is not proof of causation, experts note eggs are a brain-friendly, nutrient-dense option and can fit into a weekly diet (up to about seven eggs).
A Monash University study of over 10,800 adults aged 70+ found that regular engagement with music—listening daily, playing an instrument, or singing—was linked to lower dementia risk and better cognitive function. Frequent listeners had about a 39% lower likelihood of developing dementia than less frequent listeners; listening alone also correlated with a 17% lower rate of cognitive impairment. Playing an instrument or singing was associated with roughly a 35% dementia risk reduction, and those who both listened and played showed about a 33% lower dementia risk and 22% lower cognitive impairment risk. Researchers say music acts as a full-brain workout and often involves social interaction, which could support brain health, though genre effects weren’t explored and more research is needed along with other brain-healthy habits like exercise and socialization.
A Hebrew University-led study reports that individual human cortical neurons perform far more complex computations than those in other mammals, acting like tiny deep processors due to their dendritic structure and nonlinearities. By pairing computer modeling with AI to test how hard it would be for an artificial network to mimic a neuron’s response, researchers found human neurons carry out sophisticated computations—enabling capabilities linked to language, imagination, and math—and suggest intelligence arises as much from neuron complexity as sheer numbers. The work offers a framework connecting neuronal structure to computing power and could influence future AI design toward deeper, brain-like units.
A Virginia study with over 100 adults aged 59+ tested a 12-week routine of three daily 10-minute tasks—reading aloud, handwriting, and simple math—to engage multiple cognitive pathways. The group showed a modest improvement on a brief cognitive assessment and better memory recall, with community-dwelling seniors benefiting more than those in retirement homes, suggesting that simple, varied mental activities can help maintain cognitive health as we age.
An interview with explorer Christian Clot explains that extreme heat impairs physiology and cognitive function, with effects emerging when peak temperatures reach about 32°C and daily averages stay around 24°C. The piece cites France’s 2003 heatwave with roughly 15,000 excess deaths and notes a late June heatwave estimated to cause about 5,000 additional deaths, with global heat-related mortality around 500,000 annually, underscoring the need to prepare for increasingly frequent heatwaves.
Emerging research suggests higher doses of creatine can increase brain energy and improve cognitive functions like processing speed and working memory when sleep is lacking or under stress; typical muscle-dosing (5 g/day) may not maximize brain benefits, with studies often using 10–25 g daily in short-term trials split across the day. Safety is generally good, but high-dose use should be medically supervised and limited to periods of heightened stress or sleep loss.
A NIH-funded study of more than 1,700 adults followed for over two decades found that heavy television viewing in midlife is associated with smaller brain volumes in language and cognitive-control regions and more vascular brain changes, with sedentary work not showing the same pattern. As an observational study, it cannot prove causation, but findings align with evidence that passive screen time may harm long-term brain health, while regular physical activity and cognitively engaging activities may help protect cognition.