Sleep Tied to Objective and Subjective Cognition

Amy Costa Poor objective sleep efficiency may contribute to older adults overestimating their cognitive abilities, preliminary findings from a pilot study of objective and subjective cognitive measures have shown. The pilot study underscored the important role of objective sleep measures to better understand discrepancies when patients’ own reports of everyday cognitive function don’t align with … Read more

Residential Green Space Linked to Better Cognitive Function

Dr Marcia Pescador Jimenez Exposure to green space may boost cognitive function, new research suggests. Results of a large prospective study showing increasing exposure to residential green space was associated with significantly higher scores on cognitive function measures in middle-aged women compared with women who had less exposure. This association may be explained by a … Read more

Long-Term Cannabis Use Linked to Dementia Risk Factors

Long-term cannabis use is linked to hippocampal atrophy and poorer cognitive function in midlife — known risk factors for dementia. A large prospective, longitudinal study showed long-term cannabis users had an intelligence quotient (IQ) decline from age 18 to midlife (mean 5.5 IQ points), poorer learning and processing speed compared to childhood, and self-reported memory … Read more

Does Metformin Blunt Diabetes Link to Brain Aging?

researchers published the study covered in this summary on medRxiv.org as a preprint that has not yet been reviewed. Key Takeaways Type 2 diabetes appears to significantly accelerate normal brain aging. Metformin use does not appear to prevent neurocognitive decline. Why This Matters Although preliminary evidence links type 2 diabetes to neurologic and cognitive decline, … Read more

‘Alarming’ Worldwide Decline in Mental Health

A large global report shows a decline in mental health worldwide, with the poorest outcomes reported in young adults. The Mental Health Million Project of Sapien Labs issued its second report, published online March 15, encompassing 34 countries and over 220,000 internet-enabled adults. It found a continued decline in mental health in all age groups … Read more

Can Caring for a Pet Protect the Aging Brain?

Years spent caring for a dog or cat may help mitigate cognitive decline among older adults, new research suggests. In a large study of Medicare benefits, pet owners had slower cognitive decline over 6 years than their peers who did not care for a pet. “Previous research has studied the impact of pets on overall … Read more

Healthy Gut Tied to Better Cognition

A healthy, diverse gut microbiome is associated with better cognitive function in middle age, new research suggests. Investigators cognitive conducted testing and analyzed stool samples in close to 600 adults and found that beta-diversity, which is a between-person measure of gut microbial community composition, was associated with cognitive scores. Three specific bacterial genera showed a … Read more

AHA Statement Reviews Marijuana’s Effects on Brain Health

Medicinal and recreational marijuana use has become common across the country, warranting greater awareness among clinicians about any potential adverse effects of marijuana on brain health, a new American Heart Association (AHA) scientific conclusions. The existing evidence base of preclinical and clinical research suggests that marijuana use may have a harmful effect on the brain, … Read more