Hypnosis has had a gradual conceptual emergence from an alleged mystical experience, to sleep, to a psychological shift in concentration that activates a preexisting neuro-physiological circuitry. Data are presented to support the thesis that hypnotizability exists on a spectrum that has biological as well as psychosocial components. When there is synchrony between the bio-psychosocial components of hypnotizability as measured by the Hypnotic Induction Profile (an intact flow), psychotherapy is the primary treatment strategy, with medication secondary or not at all. When measurement reveals a lack of synchrony between biological factors as measured by the Eye-Roll sign and psychosocial responsivity (a nonintact flow), medication will be primary, with different degrees of psychosocial support.

Int J Clin Exp Hypn. 2007 Oct;55(4):387-410.

Spiegel H. College of Physicians & Surgeons, Columbia University, New York, New York, USA.