In ancient times healers in the East, and especially those in India, when healing a patient of any complaint of a psychological character known either as an obsession or an effect of magic, excited the emotional nature of the patient by the emphatic rhythm of their drum and song, at the same time making the patient swing his head up and down in time to the music. This aroused his emotions and prompted him to tell the secret of his complaint, which hitherto had been hidden under the cover of fear, convention and forms of society. The patient confessed everything to the healer under the spell produced by the rhythm, and the healer was enabled to discover the source of the malady.