Topic
Neurodegeneration research, explained
18 open-access neurodegeneration studies, each with a flashcard deck and a quiz.
- How tau buildup shapes brain networks in dementia
In Alzheimer's disease, tau builds up in highly connected brain hubs and weakens their connections, while in progressive supranuclear palsy, tau accumulates in deep brain structures and forces the cortex to use less efficient, indirect pathways.
- How does brain structure change in early Parkinson's disease?
Newly diagnosed Parkinson's patients with mild cognitive impairment show rapid, widespread thinning of the brain's outer layer over 18 months compared to those with normal cognition.
- How does brain inflammation affect connectivity and thinking in AD?
Brain inflammation in Alzheimer's disease alters how large-scale networks communicate, and this disrupted connection directly relates to poorer cognitive performance.
- Can a new PET imaging tracer distinguish different tau diseases?
A new brain scanning chemical successfully maps and tells apart two different types of degenerative brain disorders based on where protein tangles build up.
- Does brain region loss predict memory decline in Parkinson's?
Damage to a specific brain region called the nucleus basalis of Meynert can predict whether a person with Parkinson's disease will develop cognitive decline.
- Using Brain Scans to Predict Cognitive Decline in Alzheimer's
Baseline PET scans tracking tau protein and brain inflammation predict future cognitive decline over three years, while brain shrinkage measurements add no extra predictive power.
- Using Virtual Reality to Detect Early Alzheimer's Disease
A virtual reality walking test assessing entorhinal cortex function accurately identifies patients with early-stage, biomarker-proven Alzheimer's disease.
- Does brain white matter change before Alzheimer's symptoms start?
Changes in the brain's white matter connection pathways can be detected up to a decade before the onset of inherited Alzheimer's disease symptoms.
- How does brain network activity relate to visual hallucinations?
People with Parkinson's disease who experience visual hallucinations show abnormally high connectivity within the brain's default mode network compared to those without hallucinations, despite an overall decline in network connectivity caused by the disease itself.
- Mapping amyloid plaques and brain connectivity in Alzheimer's
Amyloid-beta plaques accumulate within highly connected brain hubs, but locally, this accumulation actively disrupts and reduces that very connectivity.
- Does T2DM impair glymphatic flow on DTI-ALPS?
In 30 adults, longer T2DM history tracked with lower ALPS-index values, suggesting reduced perivascular water diffusivity.
- How safe is clinic lecanemab in practice?
Among 234 memory-clinic patients on lecanemab, infusion reactions (37%) and ARIA (22%) were common but generally manageable; mild dementia had much higher symptomatic ARIA.
- Brain activity during attention tasks in LBD and Alzheimer's
Alzheimer's disease and Lewy body dementia show distinct patterns of default mode network deactivation during attentional tasks despite similar behavioral deficits.
- Does a high-fat diet hit APOE4 males harder?
In APOE knock-in mice, 12 weeks of 45% fat diet produced more visceral fat and glucose intolerance in male APOE4 than APOE3 mice, while females of both genotypes responded similarly and behavior did not change.
- Does Huntington's disease disrupt the amygdala before symptoms?
People carrying the Huntington's gene showed weaker coupling between the amygdala and the face-processing area of the brain while seeing angry faces, and this weakening was greater the closer they were to predicted disease onset.
- Does Alzheimer’s tau hit retinal ganglion cells early?
In 41 donor eyes, MCI and AD retinas showed pS396-tau and oligomeric tau inside RGCs, ~50% ganglion-cell loss, and correlations with brain AD stage and cognition.
- Does C9orf72 already change parietal EEG before ALS symptoms?
In 87 asymptomatic relatives of C9orf72 ALS patients, carriers and non-carriers scored the same on a Go/NoGo attention task, but carriers showed stronger N2 negativity localized to precuneus and superior parietal cortex.
- Can a 3D MRI network spot and forecast Parkinson’s?
A 3D CNN using T1 MRI separated moderate-to-severe Parkinson’s disease from controls at 74% accuracy; transfer learning reached 64% for mild PD, and MRI plus clinical data predicted 2-year progression at >70%.