MARKET 1 Lecture Notes - Lecture 41: Catecholamine, Diazepam, Muscle Tone
Document Summary
Once stage 4 is reached, sleepers retreat back through the stages: constant cycle throughout the night. Other preceded by alpha waves waxing and waning bursts of 8-12hz waves. Voltage and frequency slower, but similar to, alert wakefulness. Rem sleep potentially related to strengthening explicit memory. K-complexes (large negative wave followed by large positive wave) Sleep at night protects from accident and predation. Posits that sleep is highly motivated, but not necessary for survival. Explains when we sleep, not necessarily why though. Studying these could be useful in determining function of sleep. Cognitive performance: but: task completion involved executive function (prefrontal cortex) is worse. Rem rebound (the nights following the rem deprivation have increased amounts of rem sleep) The longer the deprivation, the more likely that the. Invariably controlled by so-called zeitgebers, environmental cues that control the timing of circadian. Usually synchronised with body temperature cycle: but: internal desynchronization can occur! Circadian genes: tau (discovered 2000, clock (discovered 1997)
