PSY 101 Lecture Notes - Lecture 3: Psychological Dependence, Barbiturate, Hallucinogen
Document Summary
Biological rhythms are periodic physiological fluctuations (also known as biological clocks") Two important rhythms: circadian rhythm regular bodily rhythms that occur on a 24 hour cycle (e. g. temperature, wakefulness, the single most important factor contributing to the length of our sleep/wake cycles is light, stages of sleep . Sleep is periodic, natural, reversible loss of consciousness. Awake & relaxed initially, you are awake but relaxed. As measured by an eeg, brain activity consists of relatively slow brain waves, called alpha waves. Stage 1 sleep we fall asleep and brainwaves lose some of their regularity. Hallucination false sensory experiences, such as seeing something in the absence of stimuli. Brain activity is marked by sleep spindles" brief patches of rapid, rhythmic brain activity. Sleep talking occurs at this stage of sleep. Stage 3&4 sleep - brain activity changes to delta waves. Delta waves are large, slow brain waves associated with deep sleep.
