In this excerpt from his thesis, Dr Ramesh Manocha discusses a case study in which depersonalisation occurs as a result of meditation.
In his random survey of 23 students of yoga and meditation, Kennedy (1976) found that all but one of them had experienced some form of mild to moderate de-personalisation and/or de-realisation. Most of the experiences involved feelings of unreality or a sense of altered reality for a few seconds. Experiences mostly occurred in the presence of a meditation teacher and none of the respondents considered their experiences as abnormal.