Sleepwalking, night terrors, and restless leg syndrome are all examples of ________.

• A. circadian rhythm disorders
• B. REM sleep disorders
• C. parasomnias
• D. dyssomnias

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the categories of sleep disorders. There are generally two main types: dyssomnias, which involve difficulties in the amount, quality, or timing of sleep, and parasomnias, which involve abnormal behaviors or experiences during sleep.
2. Step 2: Identify the characteristics of the given examples: sleepwalking, night terrors, and restless leg syndrome. These involve unusual behaviors or sensations occurring during sleep rather than problems with sleep duration or timing.
3. Step 3: Recognize that circadian rhythm disorders relate to problems with the timing of sleep, such as delayed sleep phase or shift work disorder, which do not describe the examples given.
4. Step 4: Note that REM sleep disorders specifically involve abnormal behaviors during REM sleep, such as REM sleep behavior disorder, but sleepwalking and night terrors typically occur during non-REM sleep stages.
5. Step 5: Conclude that since sleepwalking, night terrors, and restless leg syndrome are abnormal events or behaviors during sleep, they fall under the category of parasomnias.