Elbow joint restriction: effect on functional upper limb motion during performance of three feeding activities

Area of Science:

• Biomechanics
• Human Movement Analysis
• Orthopedics

Background:

• Elbow joint motion is crucial for upper limb function during daily activities.
• Understanding compensatory movements is vital for rehabilitation and injury prevention.
• Elbow immobilization can alter the biomechanics of feeding tasks.

Purpose of the Study:

• To quantify and compare upper limb joint motion during feeding tasks with and without elbow restriction.
• To investigate the impact of elbow joint immobilization on shoulder joint kinematics.
• To assess potential risks associated with compensatory shoulder motion.

Main Methods:

• Ten male and nine female healthy, right-dominant volunteers participated.
• A splint was used to restrict elbow joint motion.
• Three feeding tasks were performed under both unrestricted and restricted elbow conditions.
• A video-based three-dimensional motion analysis system recorded joint motion.

Main Results:

• Elbow restriction led to significantly larger arcs of motion in shoulder flexion and internal rotation (p < .05).
• The differences in feeding task variations remained consistent across both restricted and unrestricted conditions.
• Increased shoulder joint motion was observed as a compensatory mechanism.

Conclusions:

• Elbow joint restriction necessitates greater shoulder joint motion during feeding.
• This increased shoulder activity may elevate the risk of shoulder girdle muscle strain and degenerative joint disease.
• Clinical decisions regarding elbow immobilization should consider the impact on overall upper limb kinematics and potential secondary issues.