Cervical Coupling Motion Characteristics in Healthy People Using a Wireless Inertial Measurement Unit
Figure 2
An example of three-dimensional cervical motion patterns described in the Euler rotation coordinates. (a) Measurement when extension and flexion are primary motions. (b) Measurement when lateral bending is primary motions. (c) Measurement when axial rotations are primary motions. Positive values represent flexion, right side bending, and right axial rotation.
