BIOL 4310 Lecture Notes - Lecture 15: Circadian Clock, Circadian Rhythm, Theta Wave
29 Mar 2020
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Document Summary
Circadian rhythm = biological cycles that have 24 h period showed in many physiological, such as sleep wake cycle. Light affects the rhythm synchronizes clock to 24 hr solar cycle iprgcs = type of photoreceptor that detect light for clock (unknown until 1998). Green light didn"t really suppress melatonin or cause delay. Rem later in night (starts after 90 min), cycles throughout stages during night. Blue light alters slow wave activity (slightly lower in first cycle, higher in third) may cause alerting effect after some time (suppressed delta and theta waves more awake alpha waves), or could indicate phase delay. Blue light caused increased alertness (showed by faster response times than after green light exposure) Timing: light exposure from 5am-5pm = assos with phase advance, later = assos w delay (light at night causes phase delays) most sensitive to blue light (which is emitted by.
