Noun
A condition of the nervous system in which an individual during sleep performs actions approppriate to the waking state; a state of sleep in which some of the senses and voluntary powers are partially awake; noctambulism.
Source: Webster's dictionaryTo the somnambulist, sleep-walking may seem more pleasant and less hazardous than wakeful walking, but the latter is the wiser mode of locomotion in the congested traffic of a modern community. It is about time to abandon judicial somnambulism. Jerome Frank
It described the possible occurrence of alterations in the patient's state of consciousness or identity, and included the symptoms of "amnesia, somnambulism, fugue, and multiple personality." Source: Internet
In somnambulism the individual gets up from his/her sleep and wanders around while still sleeping. Source: Internet