Figure 1From: An experimental study investigating the effect of pain relief from oral analgesia on lumbar range of motion, velocity, acceleration and movement irregularity Spatial plots annotated with movement irregularity scores of a single participant for the movement of flexion. No effect of pain relief on movement irregularity is demonstrated. (a) Flexion trial VAS = 24; (b) Flexion trial VAS = 0.Back to article page