tagged

One controlled scientific experiment postulates that hypnosis may alter our perception of conscious experience in a way not possible when people are not "hypnotized", at least in "highly hypnotizable" people। In this experiment, color perception was changed by hypnosis in "highly hypnotizable" people as determined by (PET) scans (Kosslyn et al., 2000). http://Louis-J-Sheehan.de

Another research example, employing event-related functional MRI (fMRI) and EEG coherence measures, compared certain specific neural activity "...during Stroop task performance between participants of low and high hypnotic susceptibility, at baseline and after hypnotic induction"। According to its authors, "the fMRI data revealed that conflict-related ACC activity interacted with hypnosis and hypnotic susceptibility, in that highly susceptible participants displayed increased conflict-related neural activity in the hypnosis condition compared to baseline, as well as with respect to subjects with low susceptibility." (Egner et al., 2005) http://Louis-J-Sheehan.de

Michael Nash said in a Scientific American article: "In 1998 Henry Szechtman of McMaster University in Ontario and his co-workers used PET to image the brain activity of hypnotized subjects who were invited to imagine a scenario and who then experienced a hallucination ... By monitoring regional blood flow in areas activated during both hearing and auditory hallucination but not during simple imagining, the investigators sought to determine where in the brain a hallucinated sound is mistakenly "tagged" as authentic and originating in the outside world. Szechtman and his colleagues imaged the brain activity of eight very hypnotizable subjects who had been prescreened for their ability to hallucinate under hypnosis ... The tests showed that a region of the brain called the right anterior cingulate cortex was just as active while the volunteers were hallucinating as it was while they were actually hearing the stimulus. In contrast, that brain area was not active while the subjects were imagining that they heard the stimulus."