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Figure 1 | BMC Musculoskeletal Disorders

Figure 1

From: Muscle activity and head kinematics in unconstrained movements in subjects with chronic neck pain; cervical motor dysfunction or low exertion motor output?

Figure 1

Example of two movement directions (extension from neutral position (EFN) and flexion back to neutral position (FBN), top row) completed at the preferred speed condition and the accompanying data for position (second row), angular velocity (third row) and rectified electromyography (μV) for the left sternocleidomastoid (SCM) (forth row) and splenius muscles (bottom row). Note the differences in Y axis scaling between muscles. Dashed and solid vertical lines depict start and stop of movements, respectively. The control participant scored about average for the kinematics and electromyographic amplitude for both movements.

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