Sleepwalking is a condition where one walks around unconsciously during sleep.
autoscopy
Rare psychiatric term for seeing one's own body from an external perspective. Cross-referenced with 自己像幻視.
See also: 自己像幻視
Autoscopy is known as a type of 離魂病.
自己像幻視 specifically refers to autoscopy, whereas 離魂病 can also encompass sleepwalking.
Compound of 離 (ri, 'detach') + 魂 (kon, 'soul') + 病 (byō, 'disease'), literally 'detached-soul disease'. The term reflects the traditional belief that the soul leaves the body during sleepwalking or autoscopic experiences.