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› 6 sleep
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Liberal Arts
6 sleep
Jaar 1 (universiteit)
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Non-REM sleep = constituting stages 1-4 of normal sleep, which is not characterised by rapid eye movements Normal wakefulness = full consciousness and engagement with the environment Polysomnography = the measurement of physiological activity during sleep REM sleep = stage 5 sleep characterised by rapid eye movement Alpha activity = this is the pattern of brain activity observed when an individual is in a state of relaxation. It is observed while the eyes are closed, implying that the individual is also in a state of relative inactivity. This activity is considerably slower at 8-12 Hz and the levels of activity observed in the various areas of the brain is relatively synchronised Beta activity = a pattern of activity observed when actively engaging in mental activity characterised by 13-30 Hz. Activity is synchronised in that areas of the brain vary in their levels and pattern of activity. Delta activity = this is brain activity at less than 3 Hz but with higher amplitude than the earlier stages of sleep. Observed during stages 3 and 4 of sleep. Theta activity = this is brain activity observed during stage 1 sleep and is characterised by a frequency of 3-7.5 Hz K complexes = large spikes of activity initially observed during stage 2 sleep and declining in stage 3 Sleep spindles = bursts of faster activity initially observed during stage 2 sleep and declining in stage 3 Slow-wave sleep = the combined stages 3 and 4 in which brain activity is less than 3 Hz
Ingezonden op 27-05-2014 - 765x bekeken.
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