PSYC 2410 Chapter 14: Chapter 14 - part1.doc

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2410
• Professor: Boyer Winters

Document Summary

Three standard psychophysiological measures of sleep: electroencephalogram (eeg, electrooculogram (eog, electromyogram (emg) Initial stage 1 eeg: alpha waves waxing and wandering bursts of 8- to 12-hz. Eeg waves begin to punctuate the low-voltage, high-frequency waves of alert wakefulness. Low voltage, high frequency signal that is similar to, but slower than, that of alert wakefulness. Stage 2: punctuated by two characteristic wave forms: k complexes large negative wave (upward direction) followed by a single large positive wave and sleep spindles a 1-2 second waxing and waning burst of 12- to 14-hz waves. Higher amplitude and a lower frequency than the stage 1 eeg. Stage 3: occasional presence of delta waves the largest and slowest eeg waves, frequency 1-2 hz. Sleepers are here for a long time then retreat backwards to stage 1. Rem sleep: random eye movement; emergent stage 1. Cerebral activity increases to waking levels in many brain structures(oxygen consumption, blood flow, neural firing)