Brain Shrinkage in First-Time Dads: It’s a Good Thing

First-time fathers appear to experience a loss of cortical volume following the birth of their child, new research suggests. Investigators associated with the Instituto de Investigación Sanitaria Gregorio Marañón in Madrid, Spain, and the University of Southern California compared MRIs of the brains of 40 new fathers (half located in the United States and the … Read more

When Boxers Retire, Cognition and Memory Improve

Boxers and mixed martial arts (MMA) fighters can recover cognitive and memory skills after they retire from fighting, results of a longitudinal study show. Dr Aaron Ritter “What is most exciting about the findings is that it shows us brain resiliency in action,” Aaron Ritter, MD, associate staff, neuropsychiatry and behavioral neurology, Cleveland Clinic Lou … Read more

Sleep Loss Linked to Reduced Generosity, Even at a Neuronal Level

Sleep loss, ranging from the individual level of missing a night’s sleep to a societal level of losing an hour’s sleep because of Daylight Saving Time, is associated with reduced altruism or an inclination to help others, new research suggests. These effects were observed even at the neurologic level on brain MRIs, investigators report. “In … Read more

Regular Exercise Appears to Slow Cognitive Decline in MCI

Regular exercise, regardless of intensity level, appears to slow cognitive decline in sedentary older adults with mild cognitive impairment (MCI), new research from the largest study of its kind suggests. Topline results from the EXERT trial, which is the largest study of its kind, showed patients with MCI who participated regularly in either aerobic exercise … Read more

Understanding the Neuroscience of Narcissism

The covered study in this summary was published on ResearchSquare.com as a preprint and has not yet been reviewed. Key Takeaway Maladaptive schemas (entitlement, vulnerability, and emotional deprivation) and cognitive evaluation systems (self-esteem and systemizing-empathizing) are associated with grandiose and vulnerable narcissism. Why This Matters The cognitive features and phenotypic diversity of narcissism subtypes are … Read more

PTSD May Accelerate Cognitive Decline Over Time

Posttraumatic stress disorder (PTSD) is associated with accelerated cognitive decline over time, new research suggests. In an analysis of more than 12,000 middle-aged women who had experienced at least one trauma in their lives, those with PTSD symptoms showed an approximately two-fold faster decline in cognition during follow-up compared with those who did not have … Read more

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