Summary: Researchers at the University of California, San Francisco (UCSF) have identified a set of 16 blood proteins whose levels change sharply during the menopausal transition. These molecular changes align with hormonal fluctuations—particularly in estradiol and follicle-stimulating hormone (FSH)—rather than with chronological age alone. In separate analyses of nearly 12,000 older women, higher midlife levels … Read more
Summary: When public reputation and direct personal experience conflict, people tend to trust their own interactions more than social gossip when judging refusals to help. A new study from Rissho University describes an asymmetric moral calculus: acts of helping are praised broadly, regardless of background signals, while refusals to assist are evaluated largely through the … Read more
Summary: Challenging a long-held assumption in sensory neuroscience, researchers have shown that correlated fluctuations, often called noise correlations, do not impose a strict upper limit on the amount of sensory information large neural populations can encode. By analyzing recordings from more than 20,000 neurons in the primary visual cortex (V1) across mammalian models, the team … Read more
Summary: Researchers at Mississippi State University have developed a validated mathematical framework that simulates how trace metals such as copper and zinc accelerate the aggregation of amyloid-beta (Aβ) proteins — a hallmark process in Alzheimer’s disease. Calibrated against atomic force microscopy (AFM) measurements, the model quantifies the kinetic steps by which metal binding promotes nucleation … Read more
Summary: A longitudinal study of nearly 3,900 older adults found that strong social support consistently protects attention from age-related decline across sex, race, and ethnicity, but it does not negate the damaging cognitive effects of persistent, chronic stress. The research revealed that chronic stress and social support appear to operate through different mechanisms. Women exposed … Read more
Summary: Using cryogenic electron microscopy and synthetic model membranes, researchers have mapped how the membrane phospholipid PIP2 binds to cyclic nucleotide-gated (CNG) ion channels in human retinal rod cells. The study shows that even at very low concentrations, PIP2 stabilizes these channels in a closed state, helping tune visual sensitivity in dim light and identifying … Read more
Summary: A comparative EEG study shows that companion dogs, like humans, favor consonants over vowels when breaking continuous speech into word-like units. The results indicate that complex auditory parsing and statistical learning can arise in a nonhuman species without formal language ability, suggesting common auditory strategies across mammals for identifying word boundaries in fluent speech. … Read more
Summary: Most primates, including humans, develop large, highly folded brains, but the common marmoset grows a notably smaller and nearly smooth neocortex. Using three-dimensional brain organoids together with fetal tissue, scientists at the German Primate Center (DPZ) have pinpointed cellular mechanisms that downscale cortical growth in marmosets. The team found that neural progenitor cells in … Read more
Summary: A comprehensive review of clinical psychology and neuroimaging evidence shows that humor can strengthen resilience and help prevent depressive relapse, but it is not universally beneficial. In particular, humor interventions often fail or may worsen symptoms during acute, severe depressive episodes. Their effectiveness depends heavily on the stage of illness, the social and therapeutic … Read more
Summary: Researchers recorded single-neuron activity from people with tetraplegia using intracortical brain-computer interfaces (BCIs) and found that motor cortex activity while watching actions scales with how human-like the observed actor appears. Rather than isolating a small set of dedicated “mirror neurons,” the results point to a distributed motor network whose observational responses increase with visual … Read more
