Anterior brain functions and hypnosis: A test of the frontal hypothesis

Neuropsychological frontal lobe tests were used to compare individuals with high (n = 8) and low (n = 9) hypnotizability during both baseline and hypn osis conditions. Subjects were assessed on two hypnotic susceptibility scal es and a test battery that included the Stroop test, word fluency to letter - and semantic-designated categories, tests of simple reaction time and cho ice reaction time, a vigilance task, and a questionnaire of 40 self-descrip tive statements of focused attention. Effects for hypnotic susceptibility a nd hypnosis/control conditions were scant across the dependent variables. H igh hypnotizables scored higher on the questionnaire at baseline, and their performance on the word-fluency task during hypnosis was reduced to a grea ter extent than lows. Findings indicate that although the frontal area may play an important role regarding hypnotic response, the mechanisms seem to be much more complex than mere general inhibition.