Circle Drawing Task as a Novel Evaluation Method for Upper Limb functions in Patients with Cervical Spinal Cord...

Area of Science:

• Neuroscience
• Biomechanics
• Rehabilitation Medicine

Background:

• Upper limb function is critical for activities of daily living (ADLs).
• Cervical spinal cord injury (CSCI) significantly impairs upper limb function and ADLs.
• Conventional assessments for upper limb function in CSCI lack objective measures of shoulder-elbow coordination.

Purpose of the Study:

• To introduce and validate the Circle Drawing Task (CDT) as a novel assessment for shoulder-elbow coordination in individuals with CSCI.
• To quantitatively evaluate upper limb function in CSCI patients using kinematic and electromyographic data during CDT.
• To compare shoulder-elbow coordination patterns between complete and incomplete CSCI.

Main Methods:

• 15 incomplete CSCI and 12 complete CSCI participants performed the CDT.
• 3D motion analysis captured trunk and upper limb kinematics.
• Surface electromyography (EMG) recorded activity of four key shoulder and arm muscles.

Main Results:

• The CDT effectively differentiated coordination and muscle recruitment patterns between complete and incomplete CSCI.
• Results showed a correlation between CDT performance and the level of injury.
• The task provided quantitative insights into joint coordination and muscle activation during upper limb movements.

Conclusions:

• The Circle Drawing Task (CDT) offers a valuable, quantitative method for assessing shoulder-elbow coordination in CSCI.
• CDT can complement existing clinical evaluations of upper limb function in CSCI.
• Findings from CDT can inform the prescription of targeted rehabilitation interventions for individuals with CSCI.