Sleep apnea is a disorder involving

A) temporary cessations of breathing during sleep.
B) periodic uncontrollable attacks of overwhelming sleepiness.
C) hypnagogic sensations of falling or floating weightlessly.
D) the excessive use of sleeping pills or other sleep-inducing drugs.

Sleep Apnea

An ailment disrupting sleep by causing breathing to pause or become shallow during the night.

Temporary Cessations

Short breaks or interruptions in an activity or process.

Breathing

The process of taking air into and expelling it from the lungs to facilitate gas exchange with the internal environment.