I en stor survey-undersøgelse (15.000 mennesker) fra 1991fandt man at 2,3% oplyste at have hørehallucinationer. Kun en tredjedel af stemmehørerne var tilstrækkelig besværet af stemmerne til at søge hjælp. Dvs. 2 ud af 3 stemmehørere klarede sig selv!
The Prisonner´s Cinema - Sensory Deprivation
Poul Martinsen gjorde et "hjernevask-forsøg" som led i sin tv-udsendelse om "Isolation":
This brain region has been implicated in planning complex cognitive behavior, personality expression, decision making, and moderating social behavior.The basic activity of this brain region is considered to be orchestration of thoughts and actions in accordance with internal goals.
Unlike the top-down proces of voluntary visual imagery, hallucinations is the result of direct, bottom-up activations of regions in the ventral visual pathway, regions rendered hyperexcitable by a lack of normal sensory input.
... presents strong evidence, drawn especially from what poets themselves have said, that many of them, from Homer to Yeats, have been inspired by true auditory vocal hallucinations, not just metaphorical voices.
... what seems to occur in most cases of musical inhibitions is a release of activity in the musical network when normally operative inhibitions or constraints are weakend.