noctambulation

“Somnambulism, or, as it has been called, noctambulation, is a curious phase of nocturnal cerebration analogous to the hypnotic state, or double consciousness occasionally observed in epileptics.”

Anomalies and Curiosities of Medicine

“Men have employed anxious months in search of that which, in a freak of noctambulation, was hidden by their own hands.”

Edgar Huntly or, Memoirs of a Sleep-Walker