Journal of Biological Physics

, Volume 35, Issue 2, pp 127–147

Order Parameter Dynamics of Body-scaled Hysteresis and Mode Transitions in Grasping Behavior

  • T. D. Frank
  • M. J. Richardson
  • Stacy M. Lopresti-Goodman
  • M. T. Turvey
Original Paper

DOI: 10.1007/s10867-009-9133-4

Cite this article as:
Frank, T.D., Richardson, M.J., Lopresti-Goodman, S.M. et al. J Biol Phys (2009) 35: 127. doi:10.1007/s10867-009-9133-4

Abstract

Several experimental studies have shown that human grasping behavior exhibits a transition from one-handed to two-handed grasping when to-be-grasped objects become larger and larger. The transition point depends on the relative size of objects measured in terms of human body-scales. Most strikingly, the transitions between the two different behavioral ‘modes’ of grasping exhibit hysteresis. That is, one-to-two hand transitions and two-to-one hand transitions occur at different relative object sizes when objects are scaled up or down in size. In our study we approach body-scaled hysteresis and mode transitions in grasping by exploiting the notion that human behavior in general results from self-organization and satisfies appropriately-defined order parameter equations. To this end, grasping transitions and grasping hysteresis are discussed from a theoretical perspective in analogy to cognitive processes defined by Haken’s neural network model for pattern recognition. In doing so, issues such as the exclusivity of grasping modes, biomechanical constraints, mode-mode interactions, single subject behavior and population behavior are explored.

Keywords

Order parametersHysteresisGrasping

Copyright information

© Springer Science + Business Media B.V. 2009

Authors and Affiliations

  • T. D. Frank
    • 1
  • M. J. Richardson
    • 2
  • Stacy M. Lopresti-Goodman
    • 1
  • M. T. Turvey
    • 1
    • 3
  1. 1.Center for the Ecological Study of Perception and Action, Department of Psychology, 406 Babbidge Road, Unit 1020University of ConnecticutStorrsUSA
  2. 2.Department of PsychologyColby CollegeWatervilleUSA
  3. 3.Haskins LaboratoriesNew HavenUSA