part_of adult synganglion adult synganglion supraessophageal region Fig. 14-2, Fig. 14-3, Fig. 14-17, in Biology of Ticks ISBN:0-19-505910-7. Region of the synganglion lying anterior and dorsal to the esophagus. It is the smaller of the two major regions of the synganglion. It contains protocerebrumm cheliceral, palpal, optic ganglia and the stomadeal pons. An unpaired pharyngeal nerve andthe recurrent nerve also originate here and innervate the pharynx and the esophagus, respectively. The recurrent nerve runs alongside the esophagus to a hypoesophageal ganglion adjacent to the retrocerebral organ (ROC). TADS:0000189 TADS:0000189 default_namespace