**Core Concept**
Somnambulism, also known as sleepwalking, is a parasomnia disorder characterized by walking or performing complex behaviors during deep sleep, typically in the middle of the night. It is a type of sleep disorder that affects the normal sleep-wake cycle.

**Why the Correct Answer is Right**
Somnambulism is most commonly seen in children, particularly between the ages of 4 and 8 years. This age group is more prone to sleepwalking due to the immaturity of the brain's sleep-wake regulation mechanisms, leading to an increased likelihood of entering deep sleep and experiencing arousal from this stage. The exact cause of sleepwalking is still not fully understood, but it is believed to involve a combination of genetic, environmental, and sleep stage factors.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while sleepwalking can occur in adults, it is significantly more common in children.
**Option B:** This option is incorrect because sleepwalking is not typically associated with the elderly population, although sleep disorders can become more prevalent with age.
**Option C:** This option is incorrect because sleepwalking is not typically seen in infants, as their sleep patterns are still developing.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that sleepwalking can be a symptom of underlying sleep disorders, such as sleep apnea or restless leg syndrome, or can be triggered by certain medications or medical conditions.

**Correct Answer: C. Children between the ages of 4 and 8 years.**