Sleepwalking, also known as somnambulism or noctambulism, is a sleep disorder belonging to the parasomnia family.

The act of sleep walking is governed and controlled by the frequency of nocturnal.

Sleepwalkers arise from the slow wave sleep stage in a state of low consciousness and perform activities that are usually performed during a state of full consciousness. 

These activities can be as benign as sitting up in bed, walking to the bathroom, and cleaning, or as hazardous as cooking, driving, violent gestures, grabbing at hallucinated objects, or even homicide.

In Some African cultures there is a type of voodoo dance carried out by night dancers, who move out from their beds in a state of low consciousness for the sake of going out to destroy natural plantations via their act dancing.

Although generally sleepwalking cases consist of simple, repeated behaviors, there are occasionally reports of people performing complex behaviours while asleep, although their legitimacy is often disputed.

Sleepwalkers often have little or no memory of the incident, as their consciousness has altered into a state in which it is harder to recall memories. 
Although their eyes are open, their expression is dim and glazed over.

Sleepwalking may last as little as 30 seconds or as long as 30 minutes.