PSYB64H3 Chapter Notes - Chapter 11: Jet Lag, Benzodiazepine, Zeitgeber
Document Summary
Circadiam rhythm: a repeating cycle of about 24 hours. Ultradian cycle: a cycle that occurs several times in a single day: regular cycles of relative activation and quiet occur about every. Zeitgeber: an external cue for setting biological rhythms: light is the most important zeigeber for human beings, other zeitgebers include physical activity, feeding, body temperature, and sleep-related hormones. Free-running circadian rhythms: a rhythm that"s not synchronized to environmental time cues: in the absence of natural light, human day last approximately. When food is plentiful, light has the greatest impact on circadian rhythms, but when food is scarce, animals remain awake when food is available regardless of lighting conditions. Nearly everyone acts like an owl during adolescence: teen sleep patterns might reflect a dramatic drop in melatonin. Following adolescence, many temporary owls will revert to their previous state, possibly due to the maturation of neural system that regulate sleep.
