Fig. 1. Electrode locations and method of data analysis. (A) Implantation site of the transmitter in the neck area and locations of the electrodes in the five jaw muscles. (B) Examples of 5 min of simultaneously recorded EMG of three jaw muscles. (C) The enlargement (left) shows 1 s of muscle activity from the superficial masseter. The broken lines indicate the levels 5% and 50% of the peak-EMG. A burst was classified as a series of consecutive samples exceeding a predefined level of activity. The total number of bursts during 1 day was classified for muscle activities exceeding the 5% and 50% levels, which resulted in the distributions of burst number as a function of burst length (right). Note that the 5 min example (B) is not representative of the depicted distributions in C.