Sleepwalking, also known as somnambulism or noctambulism, is a phenomenon of combined sleep and wakefulness. Burke has suffered from somnambulism (sleepwalking) his entire life. Jean-Martin Charcot made a similar distinction between stages which he named somnambulism, lethargy, and catalepsy. These disorders of arousal can range from confusional arousals, somnambulism, to night terrors. During the 1990s Emery researched somnambulism, hypnosis, and mind control. Somnambulism, known as sleep walking, is a sleeping disorder, especially among children. About 4% of adults experience somnambulism. She spent much of her time in a state of somnambulism. Balabhaskaran (Jayaram) suffers from somnambulism. "Solitaire" was given in a quadruple bill with "Somnambulism", "House of Birds" and "Danses concertantes". During the novel many residents of Niannian's village suffer from somnambulism. Technological somnambulism is a concept used when talking about the philosophy of technology.