Wakefulness, Rapid Eye Movement and Non Rapid Eye Movement sleep states overlap as transition occurs from one state to another. A smooth flow of these states is essential for good sleep. Dissociation of this smooth transition may cause sleepwalking. This can be aggravated by the following factors-

Fever

Sleep Deprivation and Obstructive Sleep Apnea

Other disorders that disrupt slow-wave sleep

Internal stimuli, such as a full urinary bladder

External stimuli, such as noises

Personality disorders

Relationship difficulties

Drugs, like thioridazine, fluphenazine, perphenazine, desipramine, chloral hydrate, and lithium