Predictive eye saccades are different from visually triggered saccades.
The metrics of eye saccades in response to random and predictable target motion were determined in 8 normal young subjects. The peak velocity of predictive saccades (PS) was significantly reduced when compared with randomly elicited saccades (RS) of equal amplitude. Saccadic gain (initial saccadic amplitude/target amplitude) was also decreased in PS. Saccadic inaccuracy was extremely frequent in PS and, in contrast to RS, it was independent of target amplitude displacement. These stimulus-dependent changes in saccadic characteristics may reflect activation of the saccadic pontine generators by different supranuclear pathways.
Bronstein
A M
AM
Neurological Department, London Hospital, Whitechapel, England.
Kennard
C
C
D000293:Adolescent; D000328:Adult; D005133:Eye Movements; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D012438:Saccades; D013997:Time Factors