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Sensory and intrinsic coordination of movement

Lee, D N and Craig, C M and Grealy, M A (1999) Sensory and intrinsic coordination of movement. Proceedings B: Biological Sciences, 266 (1432). pp. 2029-2035. ISSN 0962-8452

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Abstract

A recently generalized theory of perceptual guidance (general tau theory) was used to analyse coordination in skilled movement. The theory posits that (i) guiding movement entails controlling closure of spatial and/or force gaps between effecters and goals, by sensing and regulating the tau s of the gaps (the time-to-closure at current closure rate), (ii) a principal way of coordinating movements is keeping the rs of different gaps in constant ratio (known as tau-coupling), and (iii) intrinsically paced movements are guided and coordinated by tau-coupling onto a tau-guide, tau(g), generated in the nervous system and described by the equation tau(g) = 0.5(t-T-2/t) where T is the duration of the body movement and t is the time from the start of the movement. Kinematic analysis of hand to mouth movements by human adults, with eyes open or closed, indicated that hand guidance was achieved by maintaining, during 80-85% of the movement, the tau-couplings tau(alpha)-tau(t) and tau(t)-tau(g), where tau(t) is tau of the hand-mouth gap, tau(alpha) is tau of the angular gap to be closed by steering the hand and tau(g) is an intrinsic tau-guide.

Item type: Article
ID code: 29121
Keywords: mechanoreceptors, movement control, movement coordination, perceptual guidance, prospective control, tau, target location, nervous system, trajectories, Psychology
Subjects: Philosophy. Psychology. Religion > Psychology
Department: Faculty of Humanities and Social Sciences (HaSS) > School of Psychological Science and Health > Psychology
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 04 Apr 2011 10:27
    Last modified: 17 Jul 2013 10:12
    URI: http://strathprints.strath.ac.uk/id/eprint/29121

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