Certified Polysomnographic Technician (CPSGT) Practice Exam 2025 - Free CPSGT Practice Questions and Study Guide

Question: 1 / 400

What does the term "arousal" refer to in sleep studies?

A deep stage of sleep

A brief shift in brain activity indicating alertness

In sleep studies, the term "arousal" refers to a brief shift in brain activity that indicates a transition from sleep to a state of awareness or alertness. This shift can occur during sleep stages and is typically characterized by changes in brain wave patterns, heart rate, and muscle tone. Arousal can be due to various stimuli, such as external noises, physiological changes, or internal processes.

Understanding this concept is critical in polysomnography, as monitoring arousals helps assess the overall quality of sleep and can indicate underlying sleep disorders. The presence of frequent arousals may suggest fragmented sleep, which can have implications for a person's health and well-being.

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A prolonged period of wakefulness

The onset of REM sleep

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