Three-dimensional kinematic analysis of active cervical spine motion by using a multifaceted marker device

Area of Science:

• Biomechanics
• Medical instrumentation
• Clinical assessment

Background:

• Cervical range of motion (CROM) assessment is crucial for evaluating conditions like whiplash syndrome.
• Traditional methods for measuring 3D dynamic CROM face challenges with marker occlusion and reflection angles.
• Accurate measurement of joint angular velocity is also important for clinical analysis.

Purpose of the Study:

• To develop a convenient and accurate system for assessing 3D dynamic coupled CROM and joint angular velocity.
• To overcome limitations of existing optical tracking systems using a novel multifaceted marker device (MMD).

Main Methods:

• Development of a novel multifaceted marker device (MMD) with 5 surfaces and 5 markers.
• Utilizing an infrared optical tracking system integrated with the MMD.
• Measurement of active CROM (axial rotation, flexion/extension, lateral bending) and joint angular velocity in 30 asymptomatic young males.

Main Results:

• The MMD system effectively solved marker shielding and reflection angle issues.
• The device enabled sequential and accurate analysis of 3D dynamic movement.
• The MMD proved easy to use, safe, economical, and generated accurate CROM and angular velocity data.

Conclusions:

• The MMD-based system provides a practical and precise method for evaluating 3D dynamic CROM and joint angular velocity.
• This technology has the potential to enhance clinical assessments for various neck conditions.
• The system's ease of use and accuracy make it suitable for both patient and operator safety.