Ground Truths A Master Class on Sleep
28 snips
Mar 6, 2026 Yo-El Ju, neurologist and sleep scientist at Washington University, studies sleep, Alzheimer’s, and REM sleep behavior disorder. She covers which sleep stages matter for neurodegeneration. She explains slow-wave disruption experiments, orexin antagonist effects on biomarkers, sleep regularity and disease risk. She also discusses wearables, naps, insomnia types, menopause impacts, sleep apnea treatments, and practical sleep habits.
AI Snips
Chapters
Transcript
Episode notes
Sleep and Neurodegeneration Are Bidirectionally Linked
- Sleep and neurodegeneration interact bidirectionally, with early sleep disturbances detectable before cognitive symptoms.
- Yo-El Ju links preclinical sleep changes to accelerated amyloid and tau accumulation based on mouse and emerging human biomarker data.
Deep Sleep Suppression Raises Amyloid Levels
- Slow-wave (deep) non-REM sleep specifically correlates with amyloid beta clearance.
- Ju's closed-loop study beeped participants out of slow-wave sleep and found CSF amyloid rose proportionally to slow-wave suppression.
Orexin Antagonists Affect Tau Phosphorylation
- Orexin (dual) receptor antagonists can alter tau phosphorylation measurable in plasma.
- Ju cites a human study where DORA administration changed tau phosphorylation and neuroinflammation markers.