Depending on the purpose of the hypnotherapy (i.e., smoking cessation, weight loss, improvement in public speaking, or addressing some deep emotional turmoil), follow-up may be advisable. When trying to eradicate unwanted habits, it is good practice to revisit the therapist, based upon a date prearranged between the therapist and the patient, to report progress and, if necessary, to obtain secondary hypnotherapy to reinforce progress made.
Jump up ^ De Pascalis, V.; Magurano, M.R.; Bellusci, A. (1999). "Pain perception, somatosensory event-related potentials and skin conductance responses to painful stimuli in high, mid, and low hypnotizable subjects: Effects of differential pain reduction strategies". Pain. 83 (3): 499–508. doi:10.1016/S0304-3959(99)00157-8. PMID 10568858. INIST:1291393.
After hypnosis, participants’ memories were tested twice while the fMRI scanner recorded their brain activity. For Test 1, they were asked 40 questions about the content of the movie (for example, the actress knocked on her neighbor’s door on the way home) and 20 questions about the context in which they saw the movie (for instance, during the movie, the door to the study room was closed). These questions required a “yes” or “no” response. For Test 2, participants were asked the same 60 recognition questions, but first they heard the cue to cancel PHA. So Test 1 measured memory performance and brain activity while the PHA suggestion was in effect and Test 2 measured memory performance and brain activity after it was cancelled.