Trigeminal Hyperexcitability in Idiopathic Intracranial Hypertension: A Blink Reflex Study

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
Bedia SamanciBetül Baykan

Abstract

To compare blink reflex examination findings in patients with idiopathic intracranial hypertension (IIH) with migraineurs and controls and to investigate the role of blink reflex data in the follow-up by evaluating their relationship with clinical symptoms. We included 23 patients with IIH, 15 migraineurs, and 16 controls. Blink reflex was studied with bilateral paired stimulations, and the 2R2/1R2 and 2R2c/1R2c area ratios, 1R2, 2R2, 1R2c, and 2R2c latencies were compared (R2:ipsilateral R2 response, R2c:contralateral R2 response). 2R2/1R2 area ratios at 200, 300, and 500 ms interstimulus intervals were significantly higher in the IIH group compared with the controls, and significantly higher 2R2/1R2 area ratio at 200 ms interstimulus interval was also detected in the IIH group compared with the migraine group. Significantly shorter 2R2 latencies were found at 500 and 800 ms interstimulus intervals in IIH group compared with the migraine group and controls. Significantly higher 2R2/1R2 area ratios at 500, 800 ms, and 2R2c/1R2c area ratios at 300, 500, and 800 ms were detected in patients with IIH in remission compared with patients with attacks. The significant increase in R2 recovery rates in patients with IIH in remission su...Continue Reading

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