CBT, Hypnosis Can Change Processing of Pain

By Johnson, Kate | Clinical Psychiatry News, December 2010 | Go to article overview

CBT, Hypnosis Can Change Processing of Pain


Johnson, Kate, Clinical Psychiatry News


MONTREAL -- Psychological interventions such as cognitive-behavioral therapy and hypnosis can alter how the brain processes pain, thereby reducing patients' perception of pain, judging from findings from brain-imaging studies reported recently.

"This shows how mind and body can work in unison, and one can influence the other," said Dr. Magdalena Naylor, who works as a psychiatrist and lead investigator of one of the studies performed at the MindBody Medicine Research Clinic and Brain Imaging Program of the University of Vermont in Burlington.

The study, presented as a poster, used functional MRI (fMRI) to show that cognitive-behavioral therapy can alter dysfunctional neural circuitry associated with chronic pain.

Nine women with chronic pain resulting from low back pain or knee or hip osteoarthritis underwent fMRI before and after an 11-week CBT program for reducing pain and catastrophizing. The women's mean age was 57.5 years; their pain had an average duration of 11 years.

At baseline, amygdala reactivity in the subjects was different from that of healthy controls when they viewed emotionally upsetting photographs from IAPS (International Affective Picture System).

However, this difference disappeared after CBT, with the subjects showing reduced activity in somatosensory, frontal, and limbic areas that are associated with emotional and sensory processing, and increased activation in the left insula, Dr. Naylor said.

At the same time, the subjects reported decreased pain and better coping. Total Pain Experience scores decreased in correlation with decreased activation in the middle temporal gyrus and scores on the coping strategies questionnaire sub-scale of attention diversion.

Their score on the Beck Depression Inventory also improved in correlation with decreased activation in the superior frontal gyrus and postcentral gyrus. Dr. Naylor reported that her group has also recently published evidence of reduced pain symptoms and opioid use in a similar population (J. Pain 2010 July 8 [doi:10.1016/j.jpain.2010.03.019]).

"Our work shows that CBT decreases emotional vulnerability to negative emotions and pain, which go together," said Dr. Naylor in an interview.

"With CBT, these patients are not as emotionally dysregulated."

Her group is now examining brain structure - specifically thickness of cortices - with similar results.

"It's well documented that patients with chronic pain have thinner cortices, and this is correlated with the duration of pain.

"So we are very happy to see that with CBT we can reverse this structural damage."

Hypnosis is another psychological intervention that has been shown to alter pain processing and perception of pain, reported Dr.

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