A particularly deep state of hypnosis is known as somnambulism. Originally, the term 'somnambulism' was used to describe sleepwalking (also called 'moonstruckness'). In hypnosis, this is a deepening in which phenomena occur that cannot be achieved with light or medium hypnosis depth. A memory content can be blocked or activated here, hallucinations can be produced. Some therapists prefer somnambulism to direct suggestion therapy, not only to give healing suggestions, with temporary successes, but to find out the emotional reasons for illnesses in deep hypnosis. There is even known an even deeper hypnosis state, that of hypnotic coma (Esdaile state).