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• W2796636662 abstract "The caudal fastigial nuclei (cFN) are the output nuclei by which the medio-posterior cerebellum influences the production of visual saccades. We investigated in two head-restrained monkeys their contribution to the generation of interceptive saccades toward a target moving centrifugally by analyzing the consequences of a unilateral inactivation (10 injection sessions). We describe here the effects on saccades made toward a centrifugal target that moved along the horizontal meridian with a constant (10, 20, or 40°/s), increasing (from 0 to 40°/s over 600 ms), or decreasing (from 40 to 0°/s over 600 ms) speed. After muscimol injection, the monkeys were unable to foveate the current location of the moving target. The horizontal amplitude of interceptive saccades was reduced during contralesional target motions and hypermetric during ipsilesional ones. For both contralesional and ipsilesional saccades, the magnitude of dysmetria increased with target speed. However, the use of accelerating and decelerating targets revealed that the dependence of dysmetria upon target velocity was not due to the current velocity but to the required amplitude of saccade. We discuss these results in the framework of two hypotheses, the so-called “dual drive” and “bilateral” hypotheses. NEW & NOTEWORTHY Unilateral inactivation of the caudal fastigial nucleus impairs the accuracy of saccades toward a moving target. Like saccades toward a static target, interceptive saccades are hypometric when directed toward the contralesional side and hypermetric when they are ipsilesional. The dysmetria depends on target velocity, but the use of accelerating or decelerating targets reveals that velocity is not the crucial parameter. We extend the bilateral fastigial control of saccades and fixation to the production of interceptive saccades." @default.
• W2796636662 created "2018-04-24" @default.
• W2796636662 creator A5025934832 @default.
• W2796636662 creator A5046508807 @default.
• W2796636662 creator A5068520171 @default.
• W2796636662 date "2018-08-01" @default.
• W2796636662 modified "2023-10-01" @default.
• W2796636662 title "The caudal fastigial nucleus and the steering of saccades toward a moving visual target" @default.
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• W2796636662 doi "https://doi.org/10.1152/jn.00141.2018" @default.
• W2796636662 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6139441" @default.
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