Pointing control using a moving base of support
Document Type
Article
Publication Date
7-1-2009
Abstract
The purposes of this study were to determine whether gaze direction provides a control signal for movement direction for a pointing task requiring a step and to gain insight into why discrepancies previously identified in the literature for endpoint accuracy with gaze directed eccentrically exist. Straight arm pointing movements were performed to real and remembered target locations, either toward or 30° eccentric to gaze direction. Pointing occurred in normal room lighting or darkness while subjects sat, stood still or side-stepped left or right. Trunk rotation contributed 22-65% to gaze orientations when it was not constrained. Error differences for different target locations explained discrepancies among previous experiments. Variable pointing errors were influenced by gaze direction, while mean systematic pointing errors and trunk orientations were influenced by step direction. These data support the use of a control strategy that relies on gaze direction and equilibrium inputs for whole-body goal-directed movements. © 2009 Springer-Verlag.
Publication Source (Journal or Book title)
Experimental Brain Research
First Page
81
Last Page
90
Recommended Citation
Hondzinski, J., & Kwon, T. (2009). Pointing control using a moving base of support. Experimental Brain Research, 197 (1), 81-90. https://doi.org/10.1007/s00221-009-1893-3