Thérèse Collins1, Arslan Semroud, Eric Orriols, Karine Doré-Mazars. 1. Laboratoire de Psychologie et Neurosciences Cognitives, Paris Descartes University and CNRS (Centre National de la Recherche Scientifique), Boulogne-Billancourt, France. therese.collins@uni-hamburg.de
Abstract
PURPOSE: When saccade amplitude is systematically inadequate relative to the desired target position, the saccadic system adaptively modifies the amplitude of subsequent saccades so as to recover precise targeting capabilities. The effect of saccadic adaptation on saccade metrics (amplitude, direction) is well documented, but the effect on dynamics (velocity, duration, acceleration, deceleration) remains to be fully elucidated. METHODS: The dynamics of adapted saccades were compared with that of baseline saccades of similar amplitudes. RESULTS: The peak deceleration and skewness (duration of the acceleration period/duration of the deceleration period) were modified by adaptation. CONCLUSIONS: The results point toward involvement of the cerebellum rather than the brain stem saccade generator in human saccadic adaptation.
PURPOSE: When saccade amplitude is systematically inadequate relative to the desired target position, the saccadic system adaptively modifies the amplitude of subsequent saccades so as to recover precise targeting capabilities. The effect of saccadic adaptation on saccade metrics (amplitude, direction) is well documented, but the effect on dynamics (velocity, duration, acceleration, deceleration) remains to be fully elucidated. METHODS: The dynamics of adapted saccades were compared with that of baseline saccades of similar amplitudes. RESULTS: The peak deceleration and skewness (duration of the acceleration period/duration of the deceleration period) were modified by adaptation. CONCLUSIONS: The results point toward involvement of the cerebellum rather than the brain stem saccade generator in human saccadic adaptation.
Authors: Eric Avila; Jos N van der Geest; Sandra Kengne Kamga; M Claire Verhage; Opher Donchin; Maarten A Frens Journal: Neural Plast Date: 2015-03-02 Impact factor: 3.599