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Physiology

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Central Nervous System

Question
13 out of 22
 

REM sleep not seen



A Beta waves
B PGO spikes

C Alpha waves
D delta waves


Ans. D delta waves

I. The high-amplitude slow waves (delta waves <3 Hz) seen in the EEG during NREM stage IV sleep are periodically replaced by rapid, low-voltage EEG activity, which resembles that seen in the awake, aroused state and in stage 1 sleep.

II. For this reason, REM sleep is also called paradoxical sleep. However, sleep is not interrupted.

III. Another characteristic of REM sleep is the occurrence of large phasic potentials that originate in the cholinergic neurons in the pons and pass rapidly to the lateral geniculate body and from there to the occipital cortex.

IV. They are called pontogeniculo-occipital (PGO) spikes. The tone of the skeletal muscles in the neck is markedly reduced during REM sleep.

Central Nervous System Flashcard List

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