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Upper extremity coordination strategies depending on task demand during a basic daily activity.

Flávia Pessoni F M Ricci1, Paulo Roberto Pereira Santiago2, Ana Carolina Zampar1

  • 1Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, School of Medicine of Ribeirão Preto, University of São Paulo, Bandeirantes, Av. 3900, Ribeirão Preto 14049-900, SP, Brazil.

Gait & Posture
|August 19, 2015
PubMed
Summary

This study used electromyography (EMG) and 3D motion capture to analyze upper extremity movement during daily tasks. Findings reveal specific muscle activation and joint motion patterns crucial for effective rehabilitation strategies.

Keywords:
Activities of daily livingElectromyographyEvaluationKinematic analysisPerformance testUpper extremity

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Area of Science:

  • Biomechanics
  • Neurorehabilitation
  • Human Movement Analysis

Background:

  • Upper extremity injuries can cause significant functional deficits.
  • Accurate assessment is vital for effective rehabilitation planning.
  • Understanding movement patterns during daily activities is key.

Purpose of the Study:

  • To investigate upper extremity movement patterns using simultaneous electromyography (EMG) and kinematic analysis.
  • To assess muscle activation and joint motion during a reach, transport, and release task.
  • To provide data for more specific clinical assessments and interventions.

Main Methods:

  • Simultaneous 3D motion capture and electromyography (EMG) were used.
  • Twenty-five healthy subjects performed a reach, transport, and release task.
  • Integrated EMG (iEMG), muscle onset timing, and active range of motion (AROM) were calculated.

Main Results:

  • Early upper trapezius activation and serratus anterior activity were noted for proximal stability during the Reach phase.
  • The Transport phase showed increased muscle activity and AROM across most joints.
  • Forearm muscle activity increased to maintain wrist posture during grasping, with triceps brachii acting as a shoulder synergist.

Conclusions:

  • Simultaneous EMG and kinematic analysis provide detailed insights into upper extremity function.
  • Specific muscle activation and joint kinematics differ across task phases.
  • These findings can inform targeted assessments and interventions in upper extremity rehabilitation.