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Figure 1. Left masseteric EMG responses to 10-Hz incisal stimulation from a single person. (A) Rectified averaged EMG (n = 60) in response to decreasing amounts of pre-load. Top trace (red) shows response at the lowest pre-load (0.1 N) when periodontium is anesthetized. Bottom trace (black) is the averaged stimulus force (n = 60) applied at the lowest pre-load (0.4 N superimposed on a 0.1-N pre-load). Pre-load was varied to include the 4 steps tested (0.1, 0.2, 0.5, and 2.0 N). (B) Stimulus to EMG coherence for the data shown in (A). Traces are color-matched to (A). The horizontal dotted line represents the 99% confidence interval for significant coherence. (C) Spike trigger averaged EMGs of the same data shown in (A) and (B). Traces are color-matched. Top trace in each frame is the rectified, averaged EMG (trigger at time = 0); bottom trace is the cumulative sum of that reflex. Vertical dotted color-matched lines in each frame illustrate the onset latency and offset latency for the inhibitory response elicited by the stimulus. In the top left corner, the reflex size (n = 60) is displayed. Reflex latencies and size calculated as per Brinkworth and Türker (2003).
J DENT RES, Vol. 87, No. 2,
175-179 (2008)
DOI: 10.1177/154405910808700213
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