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Why Do Patients with Impaired Vergence Not Show “Saccadic” Vergence?
Author(s) -
Rambold Holger,
Sander Thurid,
Sprenger Andreas,
Helmchen Christoph
Publication year - 2009
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2008.03724.x
Subject(s) - saccadic masking , smooth pursuit , vergence (optics) , stimulus (psychology) , saccade , eye movement , computer vision , computer science , neuroscience , artificial intelligence , psychology , cognitive psychology
Low gain of the smooth‐pursuit system causes correcting saccades that are clinically observed as “saccadic pursuit.” In contrast, low gain of the vergence system during tracking does not appear to cause “saccadic tracking.” To further evaluate whether this clinical observation is caused by a missing interaction of vergence to step and ramp targets, vergence eye movements to step–ramp, step, and ramp targets in 3‐dimensional space were tested. Results show that vergence to a step and a ramp stimulus is additive in the step–ramp paradigm, indicating no interaction of both components.