PSY 750 Chapter Notes - Chapter 1: Alpha Waves, Cerebral Cortex, Thalamus
Document Summary
Subject is awake, eyes open, and concentrating or is excited. Neurons firing in unsynchronized manner, so their contributions to the eeg cancel each other out. Alpha waves occur when subject is awake, with eyes closed, and not thinking of anything waves stem from synchronized pulsing of neurons in thalamus and cerebral cortex large, regular waves. Delta waves waves that occur in the deep sleep stages muscle tension, heart rate, and breathing rate decline slow, irregular, high amplitude waves. Rapid eye movement sleep, most dreams occur in this period unsynchronized neural impulses characterized by saw tooth waves and waveforms that have sharp rapid deflections relaxed muscles, but high arousal (breathing and heart rate up) All waves - controlled by neurons in the thalamus that respond in an oscillating manner and synchronize activity of neurons in cerebral cortex. Stage 2,3,4 - successively deeper stages of sleep, slow-wave sleep. Rem - emergent stage 1, the onset of a new sleep cycle.
