PSYCH101 Chapter Notes - Chapter 5.1: Ultradian Rhythm, Circadian Rhythm, Sleep Spindle

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH101
• Professor: Richard Ennis

Document Summary

5. 1 - biological rhythms of consciousness: wakefulness and sleep. Rem behaviour disorder - acting out dreams in reality. Consciousness - a person"s subjective awareness, including thoughts, perceptions, experiences of the world, and self-awareness. Biological rhythms - biological patterns adapted to the cycles of organisms" environment. Infradian rhythm - any rhythm that occurs over a period of time longer than a day. Ultradian rhythm - homeostasis activity occurring in 90-120-minute cycles. Circadian rhythms - internally driven daily cycles of approx. Entrainment - when biological rhythms become synchronized to external cues such as light, temperature, or even a clock. Endogenous rhythms - biological rhythms generated by our body independent of external cues such as light. Polysomnography - set of objective measurements used to examine physiological variables during sleep. Electroencephalogram (eeg) - device that measures brain waves using sensors attached to the scalp. Frequency - number of up-down cycles every second. Amplitude - height and depth of up-down cycles.