NEUROSCI 101 Study Guide - Midterm Guide: Slow-Wave Sleep, Delta Wave, Sleep Spindle
30 Mar 2016
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Be sure you can identify a stage of sleep by looking at these 3 recordings. Eeg: stage 3: most waves in 5-9 hz range, some delta waves, stage 4: almost entirely delta waves (large amplitude, frequency of around 1 hz) **all together, these stages are referred to as slow wave sleep (sws) sometimes just 3 and 4. Eeg: brain waves have very small amplitudes and rapid frequency: desynchronized because brain is performing multitude of different functions. Eeg: brain activity alternates between distinct stages of sleep (patterns appear) Stage 1: k-complexes: large voltage, high amplitude wave; often in response to something environmental. Stage 2: sleep spindles: bursts of waves w/ frequency of 12-14 hz. Stage 2: delta waves: large amplitude, frequency of around 1 hz some in stage 3, highly predominant in stage 4 large amplitude due to highly synchronized neuron firing (neurons fire in unison)
