Hysterical stupor or yogic sleep? The conundrum.

A woman in the care of the author 40 years ago was reported to have been sleeping for 2 days. We treated her condition as conversion hysteria. Her private psychiatrist was the renowned R. D. Laing; he was unhappy with our line of management, on the grounds of the arbitrariness of the diagnosis, the labelling of the woman with a diagnosis of hysteria and the treatment of the patient without her consent. In retrospect, I wonder if she was in a state of yogic sleep (yoga nidra).