title: Normal saccadic velocities.
abstract: Although it is desirable that each laboratory establish its own normal values, this study examines the comparability of results obtained in two different laboratories with the Tracoustics RV-275 recorder. Twenty neurologically normal subjects, ages 8 to 32 years, with no history of strabismus or ocular muscle surgery, were studied. Horizontal saccades of 20 degrees across the midline, with fixation by the recorded and by the non-recorded eye, were observed. Peak velocity determinations distributed normally and ranged from 281 to 541 (mean and SD = 393 +/- 50) degr/sec. Mean velocities recorded during non-fixation were similar to those recorded during fixation. Based on these results, a twenty degree peak horizontal saccadic velocity of less than 300 degr/sec using this equipment is highly likely to be abnormally slow, irrespective of antagonist or symmetric movement comparisons; the latter cannot be relied on in cases of bilateral or multiple rotation abnormalities. The recording sequence may influence antagonist and symmetric pair comparisons.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D004585:Electrooculography / Q000295:instrumentation / Q000592:standards; D005133:Eye Movements; D005260:Female; D006801:Humans; D008297:Male; D012016:Reference Values; D012438:Saccades