The purpose of this study is to test the hypothesis that sleep homeostasis, also known as
sleep pressure or sleep drive, is different in healthy older and younger individuals.
This was an inpatient study of healthy individuals to determine whether homeostatic "sleep
drive" effects on sleep change with healthy aging. Sleep, performance, and mood were studied
on individuals sleeping different lengths of time and during wake periods of different
- Ages 18-30 and 60-85 years
- Any medications
- Sleep Disorder