The blink reflex in chronic tension-type headache, migraine, and cervicogenic headache.
R1 and R2 blink reflex latencies were investigated blind in 10 patients with cervicogenic headache, 11 patients with chronic tension-type headache, 11 patients with migraine, and 9 headache-free controls. There were no R1 or R2 latency differences between the four groups. The latency of R1 increased significantly with headache duration in tension-type headache patients. Shorter R1 latencies were found on the symptomatic side than on the non-symptomatic side in cervicogenic headache patients. The results suggest that a state of hyperactivity may be present in the ipsilateral trigeminal nucleus in cervicogenic headache. Hypoactivity, however, may develop over time in tension-type headache.
Sand
T
T
Department of Neurology, University Hospital of Trondheim, Norway.
Zwart
J A
JA
D000328:Adult; D000704:Analysis of Variance; D001767:Blinking / Q000502:physiology*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000503:physiopathology*; D009333:Neck; D011930:Reaction Time / Q000502:physiology; D018781:Tension-Type Headache / Q000503:physiopathology*