Journal
EXPERIMENTAL BRAIN RESEARCH
Volume 134, Issue 2, Pages 163-173Publisher
SPRINGER-VERLAG
DOI: 10.1007/s002210000457
Keywords
eye-hand coordination; eye movements; hand movements; reaction time; accuracy; human
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The way in which saccadic eye movements are elicited influences their latency and accuracy. Accordingly, different tasks elicit different types of saccades, Using the tasks steps, Sap, memory, scanning and antisaccade, we analyzed combined eye and hand movements to determine whether both motor systems share control strategies. Errors and latencies were measured to examine whether changes in eye motor behavior are reflected in hand motor behavior. Directional and variable errors of eye and hand changed differently according to the tasks. Moreover, errors of the two systems did not correlate For any of the tasks investigated. Contrary to errors, mean latencies of eye movements were organized in the same pattern as hand movements. A correlation of latencies indicates that both motor systems rely on common information to initiate movement. Temporal coupling was stronger for intentional tasks than for reflexive tasks.
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