Q. Which is a graph that represents the stages of sleep as a function of time?

A
Somnogram
B
Hypnogram
C
Somograph
D
Posmograph
Solution:

It is a graph that represents the stages of sleep as a function of time. It was developed as an easy way to present the recordings of the brain wave activity from an electroencephalogram (EEG) during a period of sleep.

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