Fig. 2.

The masticatory counter used in this study. The masticatory counter (a) was applied to each subject during the experiments, as shown in (b). c Examples of the EMG of masseter (1) and thyrohyoid muscles (2), and output of the sensor of the masticatory counter (3). Subjects were asked to push a button at the commencement of swallowing (4). Modified from Ref. [24] with permission