Early Stress Rewired the Gut’s Nerves, Not Just the Brain TL;DR: Early life stress produced lasting gut pain and motility changes through enteric and sympathetic nerve pathways, with pediatric cohort data pointing in the same direction. Key Findings Maternal separation produced gut hypersensitivity: The mouse model developed visceral pain sensitivity and lasting motility defects. Motility …
Early Locus Coeruleus Axon Loss May Explain Smell Loss in Alzheimer’s TL;DR: Alzheimer’s-model mice lost noradrenergic locus coeruleus axons in the olfactory bulb before major plaque buildup, took 60% longer to find buried food, and improved when microglial phagocytosis was reduced. Key Findings 3-month axon loss before heavy plaque load: AppNL-G-F mice showed a selective …
Spinal Cord MRI Could Change Early Multiple Sclerosis Follow-Up TL;DR: Routine MS monitoring focuses on the brain — but prior data suggest 12% of new spinal cord lesions appear with no simultaneous brain activity. The MSpine trial is now testing whether systematic whole-spine MRI catches disease that standard follow-up is missing. Key Findings 31.2% of …
Gut Microbiome Signal Appeared Before Parkinson’s Symptoms in GBA1 Carriers TL;DR: In people carrying a genetic risk factor for Parkinson’s but not yet symptomatic, about 25% of their gut microbiome signature already looked intermediate between healthy controls and diagnosed patients — and the shift tracked with early warning signs like sleep disruption and smell loss. …
SuperAgers Reveal Brain Biology of Preserved Memory TL;DR: Octogenarians who recall words like 50-year-olds carry a distinct brain profile: preserved cortical volume, a cingulate cortex thicker than younger adults, larger entorhinal neurons, fewer inflammatory microglia, and more von Economo neurons — the biology is real, not just motivational. Key Findings Age-80 memory matched 50-to-60-year-olds: SuperAgers …
Autism Severity Showed Up in a Shared ADHD Connectome TL;DR: In 166 verbal children diagnosed with either autism or ADHD without autism, stronger resting-state coupling between the left middle frontal gyrus and posterior cingulate cortex tracked clinician-rated autism severity across both diagnoses, while ADHD symptom ratings showed no comparable brain-wide signal. Key Findings 166 low-motion …
Low-Level Drinking Was Not Invisible to the Aging Cortex TL;DR: Even drinking within low-risk guidelines was linked to lower cortical blood flow and thinner cortex when lifetime exposure met advancing age. Key Findings All participants stayed under 60 drinks per month: The cohort excluded alcohol use disorder and focused on healthy non-smoking adults reporting low-level …
Ketamine Restored Reward Bias Across Species TL;DR: Ketamine restored reward-learning bias in both treatment-resistant depression and chronically stressed rats while leaving basic discrimination unchanged. Key Findings Reward bias increased: Ketamine significantly increased response bias toward the more frequently rewarded stimulus in both species. Healthy-control levels returned: The reward-bias effect reached levels comparable with healthy controls …
EPA Rewired Brain Vessels After Repetitive Brain Injury TL;DR: Fish-oil-derived EPA looked less like a simple neuroprotective supplement and more like a lipid signal that changed brain-vessel repair after repetitive mild traumatic brain injury. Key Findings EPA accumulated before injury: In a fish-oil diet model, eicosapentaenoic acid built up in the brain at baseline rather …
Dopamine Disruption May Start Alzheimer’s Memory Failure TL;DR: In an Alzheimer’s mouse model, early memory failure tracked a broken dopamine signal into the lateral entorhinal cortex, and both optogenetic dopamine reactivation and L-DOPA partially restored learning. Key Findings Early learning slipped: Young APP knock-in mice reached 78.6% correct trials in the final learning block, compared …
