What is the medical term for the condition of sleepwalking?

Somnambulism, also known as sleepwalking, includes undesirable actions such as walking, that occur during abrupt but limited arousals from non-rapid eye movement (NREM) slow-wave sleep. Somnambulism has been associated with various other sleep disorders. Somnambulism is characterized by: Incomplete arousal occurring during NREM sleep, usually during the earlier third of the night; the ability or inability to recall dream content; simple or complex movements that are in congruence with a dream; diminished awareness of the environment; impaired decision-making ability, planning, and problem-solving skill.

Source: National Library of Medicine