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Related Experiment Video

Updated: Jul 19, 2026

Measurement of Spatial Stability in Precision Grip
09:36

Measurement of Spatial Stability in Precision Grip

Published on: June 4, 2020

A novel instrument for quantifying grip activity during handwriting.

Tom Chau1, Jingping Ji, Cynthia Tam

  • 1Bloorview Research Institute, Bloorview Kids Rehab, Toronto, ON, Canada. tom.chau@utoronto.ca

Archives of Physical Medicine and Rehabilitation
|November 7, 2006
PubMed
Summary

This study introduces a new system to measure grip forces during handwriting. The system can differentiate between children with and without cerebral palsy, offering potential for diagnosing fine motor difficulties.

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Pediatric Neurology

Background:

  • Children with spastic hemiplegic cerebral palsy (CP) often exhibit fine motor difficulties affecting handwriting.
  • Accurate, noninvasive methods are needed to quantify grip forces and kinematic parameters during writing tasks.
  • Understanding grip force dynamics can provide insights into the underlying motor control challenges in CP.

Purpose of the Study:

  • To describe and validate a novel noninvasive instrumentation system for recording grip forces and associated parameters during handwriting.
  • To investigate the relationship between grip forces, normal forces, and temporal aspects of handwriting.
  • To explore the potential of grip force measures in differentiating children with and without hemiplegic CP.

Main Methods:

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Last Updated: Jul 19, 2026

Measurement of Spatial Stability in Precision Grip
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Measurement of Spatial Stability in Precision Grip

Published on: June 4, 2020

Capturing Representative Hand Use at Home Using Egocentric Video in Individuals with Upper Limb Impairment
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Capturing Representative Hand Use at Home Using Egocentric Video in Individuals with Upper Limb Impairment

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  • An exploratory case series design was employed.
  • A specialized instrumentation system was used to capture grip forces and normal forces during handwriting.
  • Participants included 6 children with spastic hemiplegic CP and 6 typically developing children.

Main Results:

  • Significant correlations were found between normal and grip forces, with a notable temporal delay observed.
  • A consistent grip-to-normal force ratio was identified across all participants.
  • Five novel parameters derived from grip force measures successfully differentiated between children with and without hemiplegic CP.

Conclusions:

  • The developed instrumentation offers new insights into grip and normal force coordination during handwriting.
  • This system has the potential to identify distinct grip force characteristics associated with handwriting difficulties.
  • Further research with larger cohorts is necessary to establish normative values for the new grip measures.