PSY 001 Lecture Notes - Lecture 16: Polysomnography, Falsifiability, Prefrontal Cortex
13 Aug 2020
School
Department
Course
Professor
Document Summary
Rem (rapid eye movement sleep, paradoxical sleep): stage characterized by rapid eye movement, high level of brain activity and deep relaxation of the postural muscles. It is light because the brain is active and the body"s heart rate, breathing rate, and temperature fluctuate substantially. It is deep because the large muscles of the body that control posture and locomotive are deeply relaxed. Reports 85-90% of people report dreaming when awakened at this time. Dreams are longer, more visual and complicated. Reports 50-60% of people report dreaming when awakened at this. Eeg (electroencephalograph): measures and amplifies tiny electrical charges on the scalp that reflect patterns of brain activity. Long, high amplitude, slow waves= synchrony among neurons and overall low brain activity. Polysomnography: a device that combines an eeg with a simultaneous measure of eye movement. Stage 2 has the least waves, stage 4 has the most. Sleep spindles: waves of brain activity of about 12- 14 per second.
