PSYCH-101 Lecture Notes - Lecture 12: Sleep Spindle, Delta Wave, Suprachiasmatic Nucleus
9 Jul 2020
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Document Summary
Stages of sleep: distinctive changes in the electrical activity of the brain and accompanying physiological responses of the body that occur as you pass through different phases od sleep. Alpha stage: feeling of being relaxed and drowsy, usually with the eyes closed. Non- rem sleep: where you spend approximately 80% of your sleep time, divided into four stages, identified by particular patterns of brain waves and physiological responses, begin with stage 1, stage 1 sleep. Transition from wakefulness to sleep that lasts one to seven minutes. Gradually lose responsiveness to stimuli and experience drifting thoughts and images. Presence of theta waves: stage 2 sleep. Beginning of what we know as sleep. High- frequency bursts of brain activity called sleep spindles. Muscle ten: stage 3 and 4. Begin to show presence of slow brain-wave patterns called delta waves in stage 3. Waves of very high amplitude and very low frequency (delta waves)
