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A classic brain test exposed AI's biggest weakness

12 hours 44 minutes ago
Researchers gave top AI models a classic attention test used in psychology and found a major flaw. While the models could correctly name colors in short lists, their performance deteriorated sharply as the task became longer and more complex. Some leading systems fell from over 90% accuracy to nearly complete failure.

Scientists mapped every neural connection in a fruit fly and found a surprise

13 hours 26 minutes ago
A groundbreaking new connectome maps every neural connection in an adult fruit fly’s central nervous system, creating an unprecedented view of how the brain and body work together. The findings suggest that complex behaviors emerge from distributed local circuits rather than a single central controller, offering new clues about intelligence, movement, and brain function.

Cognitive trajectories and mortality risk in older adults: a 9-year follow-up study

13 hours 37 minutes ago
Cognitive decline is a central feature of aging and a major determinant of disability and mortality. Understanding cognitive trajectories is essential for identifying individuals at risk and informing preventive strategies. In this study, we estimated transition probabilities across cognitive states and examined predictors of cognitive deficit and mortality among 1,413 community-dwelling older adults for nine years. Cognitive status was assessed at baseline and at two follow-up waves (2006,...
Gabriela Cabett Cipolli

Protein Tyrosine Phosphatase 1B-Mediated Granulosa Cell Insulin Resistance Links Metabolic Stress to Aging-Relevant Ovarian Dysfunction and Is Reversed by Gengnianchun

13 hours 37 minutes ago
Metabolic disorders, particularly insulin resistance, are increasingly recognized as accelerators of female reproductive decline. However, the molecular mechanisms by which peripheral metabolic stress translates into impaired ovarian reserve remain incompletely understood. Here, we propose that protein tyrosine phosphatase 1B (PTP1B), a negative regulator of insulin signaling, serves as a molecular bridge linking systemic insulin resistance to aging-relevant ovarian dysfunction and can be...
Yanqiu Rao

Treg-microglia crosstalk in Alzheimer's disease: stage-dependent dynamics, molecular mechanisms, and translational challenge

13 hours 37 minutes ago
Alzheimer's disease (AD) is characterized by amyloid-beta (Aβ) deposition, tau hyperphosphorylation, and chronic neuroinflammation. Emerging evidence from preclinical models suggests that aberrant immune crosstalk between regulatory T cells (Tregs) and microglia may contribute to disease progression, though its precise role in human AD remains to be fully elucidated. In rodent models, Tregs have been shown to cross the blood-brain barrier and, through cell-contact-dependent mechanisms and...
Hua Fu