The Efficacy of Hypnotic and Nonhypnotic Response-Based Imagery for Self-Managing Recurrent Headache
Two experiments investigated the use of hypnotic and nonhypnotic response-based imagery training for recurrent headache. In Experiment 1, subjects with symptoms of chronic migraine headache (CMH), or chronic mixed migraine/tension headache (Mixed CMH/CTH) were assigned to a Hypnotic or Nonhypnotic Imagery group, or to a Monitoring Control group. Treatment efficacy was assessed over two-week intervals, at Baseline, Post-treatment, and three successive follow-up periods. In Experiment 2, subjects with symptoms of chronic tension headache (CTH) were assigned to four conditions (Hypnotic Imagery/Nonhypnotic Imagery/Placebo/Monitoring Control), and studied across two-week intervals at Baseline, Post-treatment, and eight-week Follow-up. Hypnotic and Nonhypnotic Imagery conditions did not differ in demonstrating efficacy in reducing headache activity in both experiments. Treatment outcome was not associated with medication consumption, or actual changes in physiologic processes (cardiovascular functioning and frontalis EMG). Headache reduction was not correlated with hypnotizability or the trait propensity to engage in vivid imagery. These results replicate and extend previous findings, and support the use of imagery strategies as a treatment component in pain management programs.