Why We Sleep By Matthew Walkerrar -

Occurs more frequently in the second half of the night. This stage is essential for "emotional first aid," helping to process traumatic events and foster creative problem-solving by making novel neural connections. Critical Health Impacts of Sleep Deprivation

Walker highlights that missing even a small amount of sleep can have "dire" consequences: Why We Sleep by Matthew Walkerrar

Sleep loss keeps the "fight-or-flight" system in overdrive, leading to higher blood pressure and increased risks of heart attack and stroke. Occurs more frequently in the second half of the night

Just one night of four hours of sleep can reduce natural killer (NK) cells —which fight cancer—by up to 70%. Why We Sleep by Matthew Walkerrar

Chronic lack of sleep is a key risk factor for Alzheimer’s disease as it prevents the brain from clearing toxic amyloid proteins.