AP Psychology – 2026 Biological Bases of Behavior Practice Test: The Complete All-in-One Study Guide to Exam Success!

Narcolepsy is a neurological disorder that is characterized by uncontrollable sleep attacks, which are sudden episodes of sleep that can occur at any time during the day. Individuals with narcolepsy may experience an overwhelming urge to sleep, often leading to naps that last from a few seconds to several minutes. The disorder can also include symptoms such as cataplexy, which is a sudden loss of muscle tone triggered by strong emotions, and disrupted nighttime sleep.

In contrast, sleep apnea primarily involves episodes of interrupted breathing during sleep, leading to poor sleep quality and excessive daytime sleepiness. REM sleep behavior disorder is associated with the acting out of dreams during the REM stage of sleep, while insomnia refers to difficulty falling or staying asleep. Each of these conditions has distinct characteristics, but it is narcolepsy that is specifically noted for the sudden and uncontrollable sleep attacks.