Visual and motor constraints on trajectory planning in pointing movements

Palluel-Germain, R., Boy, Frederic, Orliaguet, J. P. and Coello, Y. 2004. Visual and motor constraints on trajectory planning in pointing movements. Neuroscience Letters 372 (3) , pp. 235-239. 10.1016/j.neulet.2004.09.045

Full text not available from this repository.

Abstract

The aim of the present study was to show that planning and controlling the trajectory of a pointing movement is influenced not solely by physical constraints but also by visual constraints. Subjects were required to point towards different targets located at 20◦, 40◦, 60◦ and 80◦ of eccentricity. Movements were either constrained (i.e. two-dimensional movements) or unconstrained (i.e. three-dimensional movements). Furthermore, movements were carried out either under a direct or a remote visual control (use of a video system). Results revealed that trajectories of constrained movements were nearly straight whatever the eccentricity of the target and the type of visual control. A different patternwas revealed for unconstrained movements. Indeed, under direct vision the trajectory curvature increased as the eccentricity augmented, whereas under indirect vision, trajectories remained nearly straight whatever the eccentricity of the target. Thus, movements controlled through a remote visual feedback appear to be planned in extrinsic space as constrained movements.

Item Type:	Article
Status:	Published
Schools:	Schools > Psychology
Uncontrolled Keywords:	Pointing movements; Visual constraint; Trajectory planning
ISSN:	0304-3940
Last Modified:	19 Mar 2016 22:58
URI:	https://orca.cardiff.ac.uk/id/eprint/33411

Citation Data

Cited 12 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item