Doctor, when can I drive? - compensation capability while driving with restricted elbow - a biomechanical analysis

Area of Science:

• Biomechanics
• Human Factors Engineering
• Automotive Safety

Background:

• Safe driving requires specific joint range of motion (ROM).
• Limited research exists on compensating for elbow flexion/extension restrictions while driving.
• Understanding compensatory movements is crucial for driver safety and rehabilitation.

Purpose of the Study:

• To analyze upper extremity kinematic chain movement patterns (wrist, elbow, shoulder) during simulated driving with a restricted elbow.
• To identify compensatory strategies employed by adjacent joints when elbow ROM is limited.

Main Methods:

• Twenty participants drove in a simulator under two conditions: free ROM and 90° restricted right elbow flexion.
• Driving performance metrics (speed, lane accuracy, shifting time) were recorded.
• Full-body motion capture system analyzed ROM of wrist, elbow, and shoulder during three maneuvers (shifting, left turns, right turns).

Main Results:

• Driving speed decreased during right turns with elbow restriction (37.45 vs. 32.53 km/h).
• Increased shoulder ROM was observed on the right side during turns with a restricted elbow.
• Increased left elbow and bilateral shoulder ROM occurred during gear shifting with a restricted elbow.

Conclusions:

• The study demonstrates upper extremity compensatory movements during simulated driving with a restricted elbow.
• The left arm and right shoulder compensate for restricted elbow movement during turns.
• Altered movement patterns in the left elbow and shoulders are used for gear shifting.
• Physicians should consider shoulder and left elbow ROM when assessing driving ability in patients with elbow restrictions.