Do patients with interictal migraine modulate pain differently from healthy controls? A psychophysical and brain imaging study

Lee B. Kisler, Yelena Granovsky, Robert C. Coghill, Elliot Sprecher, David Manor, David Yarnitsky, Irit Weissman-Fogel

Research output: Contribution to journalArticlepeer-review

Abstract

Studies in interictal migraine show either normal or impaired pain modulation, at the psychophysical level. To date, pain modulation in migraineurs has yet to be explored concurrent with imaging methods. We aimed to investigate brain activity associated with endogenous analgesia by functional magnetic resonance imaging in attack-free migraineurs. Thirty-nine episodic migraineurs and 35 controls participated. Endogenous analgesia efficiency was assessed by the conditioned pain modulation (CPM) paradigm during functional magnetic resonance imaging. Conditioned pain modulation included 4 stimulation sequences of either test stimulus (noxious contact heat at forearm) given stand alone (Ts_alone) or concomitant to contralateral foot immersion in cold water (Ts_conditioned). The psychophysical CPM (Ts_conditioned minus Ts_alone; 0-10 numerical rating scale) and related brain activity were examined. No group differences were found in the psychophysical CPM (controls: 20.52 6 0.80; migraineurs: 20.20 6 0.88; repeated-measures analysis of variance: P 5 0.110) or related brain activity (family wise error [P, 0.05] correction at the voxel level). Within groups, controls showed a significant CPM effect (Ts_alone: 6.15 6 2.03 vs Ts_conditioned: 5.63 6 1.97; P, 0.001), whereas migraineurs did not (Ts_alone: 5.60 6 1.92 vs Ts_conditioned: 5.39 6 2.30; P 5 0.153); yet, both groups showed significant CPM-related decreased deactivation in prefrontal areas including the superior frontal gyrus and parietal regions including precuneus. The change in brain activity seems related to task demands rather than to pain reduction. The lack of group difference between migraineurs and controls in CPM and its related brain activity may result from (1) the specific CPM methodology used in this study, since migraineurs are reported to show various pain modulation efficiency for different test paradigms and/or (2) pathophysiological diversity of patients with migraine.

Original languageEnglish
Pages (from-to)2667-2677
Number of pages11
JournalPain
Volume159
Issue number12
DOIs
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 International Association for the Study of Pain

Keywords

  • Conditioned pain modulation
  • Functional magnetic resonance
  • Migraine
  • Psychophysics

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology
  • Anesthesiology and Pain Medicine

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