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. Author manuscript; available in PMC: 2015 Jun 6.
Published in final edited form as: Neuroscience. 2014 Mar 28;269:21–34. doi: 10.1016/j.neuroscience.2014.03.041

Figure 5.

Figure 5

Mean EMG traces (raw, rectified) and kinematic displacement data normalized to the imperative stimulus (a, left panel) and normalized to the lower lip opening onset (b, right panel). EMG traces are arranged in the following order (from top): left SCM (LSCM), right SCM (RSCM), upper lip (UL), and lower lip (LL). Kinematic trajectories depict mean vertical displacement of the lips, with the upper lip (UL) on top and the lower lip (LL) at bottom. Results from startle trials (black lines) were superimposed on those from control trials (grey lines). Note in panel (a), the speeding of the response relative to the imperative signal showing a StartReact effect. Note in panel (b) when normalized to the lower lip opening the movements appear near identical, confirming a similar movement was triggered by the SAS