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Related Experiment Videos

Experimental toothclenching in common migraine.

K Jensen, P Bülow, H Hansen

    Cephalalgia : an International Journal of Headache
    |December 1, 1985
    PubMed
    Summary
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    Voluntary toothclenching did not significantly impact headache frequency or intensity in common migraine patients. This study suggests muscle ischemia and fatigue are unlikely triggers for migraine attacks.

    Area of Science:

    • Neurology
    • Pain Management
    • Muscle Physiology

    Background:

    • Common migraine is a prevalent neurological disorder.
    • The role of muscle tension and fatigue in triggering migraine attacks remains incompletely understood.
    • Previous research has explored various physical stressors, but conclusive evidence linking pericranial muscle strain to migraine onset is lacking.

    Purpose of the Study:

    • To investigate the effect of voluntary toothclenching at different intensities on headache development in patients with common migraine.
    • To determine if increased pericranial muscle tension or fatigue can precipitate migraine attacks.
    • To explore the relationship between headache intensity, pericranial muscle tenderness, and experimental muscle strain.

    Main Methods:

    • Forty-eight patients with common migraine were randomized into two groups.

    Related Experiment Videos

  • Group 1 performed low-level (5%) and Group 2 high-level (30%) voluntary toothclenching for 30 minutes, monitored by surface EMG.
  • Headache, nausea, muscle soreness, and pericranial muscle tenderness were assessed using visual analogue scales and manual palpation.

    • Main Results:

    • Headache developed in 63% of patients in both groups, with no significant difference.
    • Higher muscle tension in Group 2 did not lead to increased headache frequency or intensity.
    • Five patients in the low-level tension group experienced migraine attacks within 24 hours, compared to none in the high-level tension group (though this difference was not statistically significant).
    • Pericranial muscle tenderness remained unaffected, and no significant correlation was found between headache intensity and tenderness.

    Conclusions:

    • Voluntary toothclenching, even at high intensity, does not appear to be a reliable trigger for common migraine attacks.
    • Findings suggest that muscle ischemia, fatigue, or strain on muscle insertions are unlikely to be primary causes of common migraine.
    • Further research is needed to elucidate the complex mechanisms underlying migraine pathophysiology.