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Grip force control during object manipulation in cervical myelopathy.

Naoto Noguchi1, Bumsuk Lee2, Shoya Kamiya3

  • 1Faculty of Rehabilitation, Gunma University of Health and Welfare, Maebashi, Japan.

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Grip force (GF) control assessment in cervical myelopathy (CM) patients shows promise. Measuring individual finger GF offers a new indicator for upper extremity symptom severity in CM.

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Area of Science:

  • Neurology
  • Biomechanics
  • Rehabilitation Medicine

Background:

  • Cervical myelopathy (CM) significantly impacts upper extremity function.
  • Objective evaluation of grip strength is crucial for assessing CM severity.
  • Current clinical tests may not fully capture functional deficits.

Purpose of the Study:

  • To objectively evaluate grip force (GF) control during a holding task in individuals with CM.
  • To correlate GF measurements with established clinical assessments.
  • To determine the utility of GF control in predicting CM symptom severity.

Main Methods:

  • Cross-sectional study involving 26 individuals with CM (52 hands).
  • Participants performed a pulp pinch grip-and-lift task.
  • Individual finger GF was monitored during object holding; correlations with clinical tests were analyzed.

Main Results:

  • Thumb GF negatively correlated with the 10-s test; index finger GF positively correlated with cutaneous pressure threshold.
  • A regression model incorporating GF showed improved predictive value for upper extremity symptom severity compared to conventional tests.

Conclusions:

  • Individual finger GF control assessment is a potential new indicator for upper extremity symptom severity in CM.
  • GF measurement offers an objective method to complement existing clinical evaluations.
  • Further research can validate GF control as a standard clinical metric for CM.