**Core Concept**
Somnambulism, also known as sleepwalking, is a parasomnia characterized by walking or performing complex behaviors during deep non-rapid eye movement (NREM) sleep, typically occurring in the slow-wave sleep stage. It is a disorder of arousal from non-rapid eye movement sleep.

**Why the Correct Answer is Right**
Somnambulism is often associated with genetic predisposition, sleep deprivation, and certain medications such as sedatives and antidepressants. Individuals with a family history of somnambulism are more likely to experience it. The exact mechanism of somnambulism is not fully understood, but it is thought to involve an abnormality in the normal sleep-wake cycle regulation, possibly due to an imbalance in neurotransmitters such as serotonin and norepinephrine.

**Why Each Wrong Option is Incorrect**
**Option A:** Somnambulism is typically associated with deep NREM sleep, not rapid eye movement (REM) sleep.
**Option B:** While sleep deprivation can trigger somnambulism, it is not the only contributing factor.
**Option C:** Somnambulism is not typically associated with an increase in body temperature.

**Clinical Pearl / High-Yield Fact**
Somnambulism often runs in families and can be triggered by sleep deprivation, certain medications, and hormonal changes. It is essential to establish a consistent sleep schedule and create a safe sleep environment to reduce the risk of injury.

**Correct Answer:** None of the above