Skip to main content
Log in

Grip force adjustments induced by predictable load perturbations during a manipulative task

  • Research Article
  • Published:
Experimental Brain Research Aims and scope Submit manuscript

Abstract

 The experiment examined the anticipatory modulation of grip force with respect to load force during a drawer opening task. An impact force was introduced by a mechanical stop that arrested movement of the pulling hand. The results showed a typical grip force profile which consisted of two evolving phases, one to control drawer movement onset, and the other to secure grip force at the expected impact. Initially, grip force increased with the load force that was developed to overcome the inertia of the drawer. After the first peak, a small decline was observed, followed by a proactive grip force increase prior to the time of impact. During this ramp-like increase of grip force, load force remained unchanged. In addition, a reactive response was triggered by the impact. That anticipatory control with respect to an impact force is not innate but, rather, is learned by experience was evidenced by a comparison of adults and children. Whereas adults made the characteristic grip force adjustments to anticipate the impact, children used a probing strategy with irregular build-up of force until impact. Furthermore, adults calibrated the second phase of the grip force profile in the initial trials of the task, indicating that grip force was rapidly updated with information related to the impact force. The present results demonstrate that grip-load force coordination during manipulation is a necessity for dealing with destabilizing load perturbations produced by self-induced movement and impact forces. It is concluded that grip force is adjusted automatically, but in a flexible manner, to secure grip in accordance with the characteristics of the pulling synergy.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Subscribe and save

Springer+ Basic
EUR 32.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or Ebook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

Author information

Authors and Affiliations

Authors

Additional information

Received: 13 October 1997 / Accepted: 29 June 1998

Rights and permissions

Reprints and permissions

About this article

Cite this article

Serrien, D., Kaluzny, P., Wicki, U. et al. Grip force adjustments induced by predictable load perturbations during a manipulative task. Exp Brain Res 124, 100–106 (1999). https://doi.org/10.1007/s002210050604

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/s002210050604

Navigation