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Fig. 4 | BMC Musculoskeletal Disorders

Fig. 4

From: Kinematic characterization of clinically observed aberrant movement patterns in patients with non-specific low back pain: a cross-sectional study

Fig. 4

a Example of lumbar spine phase-plane diagram representing percentage of total angular displacement (x axis) versus instantaneous angular velocity (y axis) during forward bending. Local minimum and maximum occurrence of the phase-plane diagram (+, insert) represent disruptions in angular velocity (sudden deceleration and acceleration) that are associated with judder. This pattern can also be characterized by quick out of plane deviation in the pelvis or lumbar spine plane angle-angle diagram (b) over a short period of time (as indicated by +, in both diagrams). These out of plane deviations are consistent with sudden decreases and increases in angular velocity in the pelvis or lumbar spine phase plane diagram

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