The role of vision in the control of continuous multijoint movements

Caroline J. Ketcham, Natalia Dounskaia, George E. Sielmach

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

The authors investigated whether visual fixations during a continuous graphical task were related to arm endpoint kinematics, joint motions, or joint control. The pattern of visual fixations across various shapes and the relationship between temporal and spatial events of the moving limb and visual fixations were assessed. Participants (N = 16) performed movements of varying shapes by rotating the shoulder and elbow joints in the transverse plane at a comfortable pace. Across shapes, eye movements consisted of a series of fixations, with the eyes leading the hand. Fixations were spatially related to modulation of joint motion and were temporally related to the portions of the movement where curvature was the highest. Gathering of information related to modulation of interactive torques arising from passive forces from movement of a linked system occurred when the velocity of the movement (a) was the lowest and (b) was ahead of the moving limb, suggesting that that information is used in a feedforward manner.

Original languageEnglish (US)
Pages (from-to)29-44
Number of pages16
JournalJournal of motor behavior
Volume38
Issue number1
DOIs
StatePublished - Jan 1 2006

Keywords

  • Coordination
  • Limb control
  • Oculomotor control

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience

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