The American Academy of Sleep Medicine has listed criteria for the diagnosis of somnambulism (sleep walking).
Criteria:
(1) ambulation occurs during sleep
(2) persistence of sleep, altered state of consciousness or impaired judgment during ambulation (see below)
(3) findings not better explained by an alternative diagnosis
Persistence of sleep, altered state of consciousness or impaired judgment is indicated by one or more of the following:
(1) difficulty to arouse the person
(2) mental confusion when awakened from episode
(3) amnesia for episode, partial or complete
(4) routine behaviors that occur at inappropriate times
(5) inappropriate or nonsensical behaviors
(6) dangerous or potentially dangerous behaviors
