Unlabelled: The blink reflex - a simple, non-invasive and inexpensive test - may be indicative of lesions or dysfunctions of the brainstem, and particularly assesses the trigeminal-facial arch. Results from alterations of the blink reflex in patients with headaches have provided controversial data.
Method: Registration of the waves R1 and R2 (ipsilateral to the stimulus) and R2c (contralateral to the stimulus) by electroneuromyography.
Results: A large number of controls (n=160) and patients with chronic migraine (n=160) were studied. No significant differences were observed between the two groups.
Conclusion: It is possible that this relatively simple and primitive reflex is not affected unless there is significant damage to the brainstem.
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