Development of a Novel Technique to Record 3D Intersegmental Angular Kinematics During Dynamic Spine Movements

Area of Science:

• Biomechanics
• Spine Kinematics
• Motion Analysis

Background:

• Current methods for gross spine kinematics lack intersegmental detail.
• Existing techniques are sensitive to marker errors and skin movement artifacts.
• Dynamic intersegmental spine motion analysis is crucial for understanding spinal function.

Purpose of the Study:

• Develop and validate a novel method for recording intersegmental spine kinematics.
• Ensure the method's accuracy, precision, and robustness against common errors.
• Compare the novel method with electromagnetic sensors for trunk movements.

Main Methods:

• A new intersegmental spine kinematics recording method was developed.
• Four healthy participants performed trunk flexion, lateral bending, and axial twist.
• Data were collected using the novel method and electromagnetic sensors.

Main Results:

• The novel method demonstrated accuracy and precision comparable to existing techniques for flexion and lateral bending.
• Axial twist showed the largest kinematic differences between methods.
• The method showed relative insensitivity to marker misplacement and skin movement artifacts, particularly in the lumbar region.

Conclusions:

• The developed method offers a robust and accurate way to dynamically record intersegmental spine kinematics.
• This technique has the potential to advance the understanding of spinal biomechanics.
• The method's resilience to artifacts enhances its clinical and research applicability.