A Dynamic Model of Human Limb Selection

Ralf F.A. Cox*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Two experiments and a dynamic model forhuman limb selection are reported. In Experiment 1, left-handed and right-handed participants (N = 36) repeatedly used one hand for grasping a small cube. After a clear switch in the cube’s location, perseverative limb selection was revealed in both handedness groups. In Experiment 2, the cubes were presented in a clockwise and counter-clockwise sequence to right-handed participants (N = 15). A spatial shift in the switch point between right-hand use and left-hand use was observed. The model simulates the experiments by implementing the nonlinear multiple-timescale dynamics of the action-selection process underlying limb selection. It integrates two mechanisms that were earlier proposed to underlie this selection aspect of manual activity: limb dominance and attentional information. Finally, the model is used to simulate an influential earlier experiment, by establishing a conceptual link between cross-lateral inhibition asymmetry and the direction and strength of handedness.

Original languageEnglish
Pages (from-to)530-549
Number of pages20
JournalDynamics
Volume3
Issue number3
DOIs
Publication statusPublished - Sept-2023

Keywords

  • action selection
  • dynamic model
  • handedness
  • hysteresis
  • perseveration

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