Passive Infrared Hemoencephalography
Research Papers
Passive Infrared Hemoencephalography (pIR HEG) for the Treatment of Migraine without Aura
Objective: To evaluate the impact of Passive Infrared Hemoencephalography (pIR HEG) in reducing headacherelated disability in adults with migraine without aura (MWOA). Methods: This quasi-experimental study enrolled 31 adults (M age = 38.65 years, range = 20-65 years) who met the International Classification of Headache Disorders (2nd ed.) criteria for migraine without aura (MWOA; IHS, 2004). All participants received the treatment. Participants completed a 10-week protocol of pIR HEG. Changes in headache impact were assessed at three points in time: baseline, after six treatment sessions, and after 10 treatment sessions. Outcome Measures: Headache Impact Test (HIT-6) and the Migraine Disability Assessment (MIDAS) questionnaire. Results: Significant reductions in HIT-6 scores were found between Pretest and Midtreatment, p < .001, and between Pretest and Posttest, p < .001. Significant reductions in MIDAS scores were found between Pretest and Posttest, p < .001. Results indicated MIDAS subscale A scores did not significantly change across the three time points. Significant reductions in MIDAS subscale B scores were found between Pretest and Midtreatment, p < .001, and between Pretest and Posttest, p < .001. In this study, pIR HEG appeared to be effective by the end of treatment in reducing the impact of headache-related disability among the participants.
View Full Paper →Infrared Imaging and Neurofeedback: Initial Reliability and Validity
Introduction. The neurological correlates underlying positive treatment outcomes for neurofeedback have been either unavailable or difficult to demonstrate. Assessment of brain-related changes associated with neurofeedback is needed to further establish its empirical basis. Infrared (IR) imaging is a noninvasive assessment of brain activity with high spatial and temporal resolution. Method. Study 1, a reliability study, assessed the test-retest stability of IR imaging. In Validity Study 2 and 3, IR imaging assessed brain-related changes prior to and following neurofeedback and passive infrared hemoencephalography (pir HEG) training, respectively. Results. In Study 1, high correlations occurred in pre-post comparisons for IR measures unrelated to treatment. Lower correlation between measures of IR imaging indicated changes in brain activation associated with thermoregulation following neurofeedback training. In Study 2, changes in thermal regulation occurred both within and across sessions. The change in metabolic regulation was enduring and associated with a reduction in core Autistic Spectrum Disorder symptomatology and improved cerebral connectivity. In Study 3, a significant percentage of patients with Traumatic Brain Injury increased thermal readings following pir HEG training and the change in thermal readings was associated with EEG connectivity. Conclusion. Findings indicated that IR imaging may be a reliable and valid measure of treatment outcomes with clinical utility and sensitivity.
View Full Paper →Passive Infrared Hemoencephalography: Four Years and 100 Migraines
Background. One hundred migraine sufferers were treated using passive Infrared Hemoencephalography (pIR HEG) over a period of four years. All subjects met the criteria for at least one of the categories set forth in the International Headache Society (IHS, 1988) classification criteria for headache disorders for primary migraine. Methods. Subjects were treated using the pIR HEG system in 30-minute sessions. A central forehead placement (approximately Fpz) was used for the sensor assembly for all subjects. Changes in headache patterns were examined. After two years, an infrared video imaging system was added to the data collection process and was available for 61 of the 100 subjects. Infrared forehead images were captured at the start and end of each session to examine changes in prefrontal cortical brain activity. Results. Most of the subjects improved control over their migraine headaches. Over 90% of those subjects who completed at least six sessions reported significant improvements in migraine activity. Conclusions. pIR HEG appears to have a strong impact on migraine headaches, even for people who have not had a positive response to medication. Headache response by the end of six sessions appears to be a good predictor of probability of improvement
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