"Some clinicians believe that meditation can cause psychological problems in people without underlying conditions, and that even forty minutes of meditation per day can pose risks. In 1975, The Journal of Nervous and Mental Disease published the case study of a thirty-eight-year-old woman, Mrs. M., who had no history of trauma or psychotic episodes but had begun to experience “altered reality testing and behavior” soon after taking up transcendental meditation. She was meditating for twenty minutes, twice a day. The authors, psychiatrists at the University of California, Davis, wrote that
an altered state of consciousness within days after beginning TM, and the occurrence of the “waking fantasies” shortly thereafter, leave little doubt of some causal relationship between the use of TM and the subsequent psychosis-like experience.
They concluded, “We would expect the occurrence of powerfully compelling fantasies in some portion of normal individuals utilizing depressive procedures of any form,” including meditation."
Could you offer some terms used to describe them so I could look more into this subject?