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Brain & Neurodegeneration Quiz
Quiz
According to the 2024 Lancet Commission, what fraction of dementia is preventable?
Eliminating all 14 modifiable risks globally.
The 2024 Lancet Commission update puts the preventable fraction at ~45%. Hearing loss, untreated high LDL, and vision loss are the largest single contributors among 14 modifiable risks.
Quiz
How much do amyloid plaques precede Alzheimer's symptoms?
Based on DIAN biomarker-trajectory studies.
Amyloid accumulation begins 15–20 years before clinical symptoms. This is why primary prevention (especially sleep + vascular health + metabolic control) works — there's a long silent window to intervene.
Quiz
Which single lifestyle intervention has the strongest brain-protection evidence?
Measured across multiple cohorts + trials.
Aerobic exercise is the single highest-evidence lever. Erickson et al. 2011 showed it GROWS the hippocampus. 150 min/week of moderate aerobic + 2× resistance is the dose with the strongest support.
Quiz
Which is a classic prodromal sign of Parkinson's, often preceding motor symptoms by 10+ years?
Pick the earliest red flag from the list.
Anosmia + REM sleep behaviour disorder + chronic constipation + persistent depression are the four classic prodromal Parkinson's signs, often preceding motor symptoms by a decade or more.
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