Fig. 1.

Location of the recording sites in the proximal region of the tongue where genioglossus and intrinsic muscle fibers are intermixed (GG-I) and in the geniohyoid (GH) muscle. The sites were localized post-mortem and superimposed on a parasagittal cross-section of the tongue and GH muscle (only the proximal part of the tongue near its base is shown). GG-I EMG was recorded from 6 rats (filled circles) and GH activity also from 6 rats (open circles). Simultaneous recordings from both locations were obtained from 4 of the 8 rats included in this study. The numbers denote different animals.