Authors:
Tetsuya Ijiri
;
Masahiro Shinya
;
Kohtaroh Hagio
and
Kimitaka Nakazawa
Affiliation:
The University of Tokyo, Japan
Keyword(s):
Baseball, Visuomotor Coordination, Startle Reaction, Acoustic Stimulation, Sports, Vision, Feedback, Feedforward, Efference Copy, Electromyography (Emg), Excitability, Subcortical, Motor Circuit.
Related
Ontology
Subjects/Areas/Topics:
Motor Control and Coordination
;
Motor Learning
;
Signal Processing and Motor Behavior
;
Sport Science Research and Technology
Abstract:
We investigated the mechanisms underlying timing of rapid interceptive actions under severe time constraints, such as those required in baseball, cricket, and tennis. To compensate for the temporal uncertainty of a moving target, participants were required to control their movement onset and/or duration. In Experiment 1, we tested how movement onset and/or duration are controlled under severe time constraints in a rapid baseball-simulation interceptive task. We found two distinct control strategies that modulated task performance. We also found that corrections to ongoing movements occurred more rapidly than had previously been reported. In Experiment 2, we used startling acoustic stimulation to investigate the detailed mechanisms underlying decisions about the timing of movement onset. Our findings indicate that the timing of movement onset is modified continuously via a subcortical motor circuit. Overall, our findings indicate that rapid movement decisions rely on a hybrid of feedf
orward and feedback control, allowing for the circumvention of severe time constraints during rapid interceptive actions.
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