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Measurement of Spatial Stability in Precision Grip
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Development of externally guided grip force modulation in man.

R Blank1, W Heizer, H von Voss

  • 1Institut für Soziale Pädiatrie und Jugendmedizin, Ludwig-Maximilians-University of Munich, Abt. für Psychophysiologie and Neurophysiologie, Heiglhofstrasse 63, D 81377, München, Germany. r.blank@lrz.uni-muenchen.de

Neuroscience Letters
|June 1, 2000
PubMed
Summary
This summary is machine-generated.

Children

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Area of Science:

  • Developmental neuroscience
  • Motor control
  • Sensorimotor integration

Background:

  • Understanding the development of grip force control is crucial for grasping object manipulation.
  • Previous research has explored grip force adjustments, but age-related changes in response to force dynamics require further investigation.

Purpose of the Study:

  • To investigate age-related differences in externally guided grip force adjustments.
  • To examine how force rate and direction influence grip force control development in children and adults.

Main Methods:

  • Sixty-nine children (3-6 years) and 17 adults performed isometric force changes using a pinch grip with visual feedback.
  • Participants executed ramp-like force increases and decreases at two target rates (0.5 N/s, 1.25 N/s).
  • Tracking errors were analyzed to assess precision and strategy differences.

Main Results:

  • Grip force tracking precision showed significant age effects, influenced by force rate and direction.
  • Younger children (up to 4 years) exhibited overshooting, while older children and adults demonstrated undershooting strategies.
  • Adults displayed greater sensitivity to force rate and direction compared to children.

Conclusions:

  • A developmental shift in grip force control strategies occurs, moving from feedforward control with intermittent feedback to integrated feedforward and feedback processing.
  • A critical developmental period for refining grip force control appears to be around five to six years of age.
  • These age-related changes may reflect differential maturation of cortical and cerebello-cortical pathways.