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  • Title: EMG in common migraine: changes in absolute and proportional EMG levels during real-life stress.
    Author: Goudswaard P, Passchier J, Orlebeke JF.
    Journal: Cephalalgia; 1988 Sep; 8(3):163-74. PubMed ID: 3197096.
    Abstract:
    The absolute and proportional EMG levels of the frontal, temporal, and corrugator muscles of 37 migraine patients and 37 matched controls were recorded during three experimental sessions: adaptation and real-life and experimental stress, both of long duration. Migraine patients did not show significantly different absolute EMG levels but had higher proportional EMG levels of the corrugator muscle than controls in each session. Migraine patients did not have different facial muscle responses to stress, and the two experimental groups reacted similarly to real-life and experimental stress. No relation was found between muscle activity and reported headache within 24 h after real-life stress. Increased EMG activity due to stress does not seem to be a significant cause of headache in common migraine as defined in this study, but rather a response to pain. Migraine patients with headache during stress showed lower muscle tension than patients without headache.
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