Summary: Aging is the main risk factor for neurodegenerative diseases such as Alzheimer’s and Parkinson’s, but the precise molecular changes that accumulate over time have been difficult to define. Researchers have now produced the most extensive single-cell atlas of the aging brain to date, revealing cell-type and region-specific epigenetic shifts that help explain how aging … Read more

Summary: Researchers at the University of Oxford have produced the first high-resolution molecular atlas of the adult Drosophila melanogaster brain. By integrating multiple single-cell RNA sequencing datasets, they mapped transcriptomic profiles across nearly every neuron in the central brain and showed that a neuron’s molecular identity preserves a record of its developmental origin—specifically its lineage … Read more

Summary: The menopause transition brings hormonal shifts that can challenge cognition, but new research shows psychosocial factors matter too. A study of more than 900 women found that both loneliness (the subjective feeling of disconnection) and social isolation (an objectively small or inactive social network) are each associated with greater subjective cognitive decline during perimenopause—and … Read more

Summary: Researchers have developed a promising, non-invasive retinal imaging method that uses polarized light and artificial intelligence to distinguish between Alzheimer’s disease and TDP-43–related neurodegenerative disorders such as Amyotrophic Lateral Sclerosis (ALS) and Frontotemporal Lobar Degeneration (FTLD-TDP). By analyzing how protein deposits in the retina scatter polarized light, the team can reliably identify whether deposits … Read more

Summary: Current Alzheimer’s tests typically measure the quantity of amyloid beta and phosphorylated tau proteins in blood or cerebrospinal fluid. A new study from Scripps Research suggests a different approach: examining the three-dimensional shape, or folding, of circulating proteins. The researchers found that as Alzheimer’s progresses, specific plasma proteins adopt a less “open” structural conformation—a … Read more

Summary: For decades, photoreceptor death—the loss of the retina’s light-sensing cells—was assumed to be irreversible in conditions such as age-related macular degeneration, retinitis pigmentosa, and retinal detachment. New research from the University of Michigan challenges that view. The study shows that apoptosis in photoreceptors can be reversed if cellular stress is removed and damaged mitochondria … Read more

Summary: For decades, textbooks taught that the first stage of visual processing in the cortex is driven mainly by two types of cells that detect simple edges—sharp transitions between light and dark. An international team of researchers has now overturned that narrow view. Using AI to build precise “digital twins” of individual mouse neurons, they … Read more

Summary: Researchers have long known that the brain uses “GPS-like” circuits to navigate physical spaces. New research suggests those same neural systems also create an internal map of our emotions. Using fMRI and computational modeling, investigators found that the hippocampus and the ventromedial prefrontal cortex (vmPFC) work together to represent emotions along two core axes—valence … Read more

Summary: Blockbuster weight-loss medications such as semaglutide (Wegovy/Ozempic) and liraglutide (Saxenda) have revolutionized treatment for obesity and diabetes. Yet until now we lacked a clear, high-resolution map of where the glucagon-like peptide 1 (GLP-1) system is located in the brain and whether its distribution differs by sex. A new peer-reviewed study constructed the first sex-specific, … Read more

Summary: Language is often seen as a single, effortless human ability, but recent research shows it is one of the brain’s most complex systems. Moving beyond the old Broca–Wernicke model, scientists now combine AI deep learning, ultra-high-field MRI, and large-scale genetic analyses to study how language emerges, develops, and varies across individuals. This integrated approach … Read more