Summary: Researchers have mapped more than 830,000 immune cells of myeloid origin from human brain tissue and identified a disease-associated microglial subtype that expands as Alzheimer’s disease progresses. Driven by a TREM2-centered molecular signaling cascade that includes MITF and GPNMB, these microglia exhibit enhanced capacity to engulf and clear toxic material. The study offers a … Read more

Summary: Researchers have uncovered a previously unknown mechanism by which the adult mammalian brain can repair localized tissue damage. Using longitudinal in vivo two-photon imaging and spatial gene expression mapping in mouse models, the team at the University of Zurich identified a distinct population of “regenerative” astrocytes that repopulate lesions by transporting newly formed cell … Read more

Summary: A new study tested whether large language models (LLMs) can account for human reading dynamics. Researchers compared eye-tracking measurements from 368 adult readers with predictions from more than 400 neural language models, examining how both humans and models process syntactically challenging text, including so-called “garden-path” sentences. The results reveal a clear split between human … Read more

Summary: New research shows that dogs have specialized brain networks that process human facial expressions. Using functional magnetic resonance imaging (fMRI) and machine-learning analyses, scientists monitored the brains of awake pet dogs as they viewed photos of human faces showing happiness, anger, fear, and sadness. The study found that happy human faces preferentially activate a … Read more

Summary: Researchers have identified an unexpected role for the medial prefrontal cortex (mPFC). Rather than always promoting behavioral flexibility, this brain region can sometimes hinder problem-solving by anchoring animals to a memory-driven default strategy — a “win-stay” habit that keeps mice returning to where they last found a pup instead of switching to a more … Read more

Summary: This review synthesizes evidence from 129 studies examining how exercise-induced muscle signaling protects against Parkinson’s disease (PD). It highlights the role of sarcopenia — the age-related loss of muscle mass, strength, and function — in worsening PD outcomes and explains how muscle-derived signaling molecules released during exercise can support brain health and slow disease … Read more

Summary: Researchers propose “apical hypercontextualisation,” a cellular-level neurobiological mechanism that explains how classical serotonergic psychedelics—such as psilocybin, LSD, DMT and mescaline—reshape perception, cognition and conscious experience. Moving beyond whole-brain neuroimaging, this framework focuses on the biophysics of layer V cortical pyramidal neurons, which concentrate serotonin 2A (5-HT2A) receptors along their apical dendrites and play a … Read more

Summary: Researchers have created a biologically grounded whole‑brain computer model that links microscopic molecular chemistry to macroscopic neural activity, demonstrating how regional differences in receptor density influence brain‑wide coordination and information flow. The team incorporated detailed, empirical maps of muscarinic acetylcholine receptor density across 68 cortical regions into The Virtual Brain (TVB) simulation platform, overlaying … Read more

Summary: Researchers have identified a concrete epigenetic mechanism that helps explain how early-life adversity permanently reshapes the brain’s stress-response systems. The study shows that childhood trauma raises levels of the enzyme SETD7 in dopamine-producing neurons of the ventral tegmental area (VTA), triggering lasting changes in chromatin structure that increase vulnerability to stress-related disorders in adulthood. … Read more

Summary: Researchers offer an evolutionary explanation for why human overconfidence endures despite producing costly mistakes. They argue that overconfidence can act like a costly biological signal—similar to a peacock’s tail—whose expense is precisely what makes it a credible indicator of real ability. Because the harms of inflated self-belief fall more heavily on low-ability individuals than … Read more