Fig. 2. The relationship of digestive tract responses with the pharyngeal, laryngeal, and hyoid muscles responses associated with retching and vomiting. Note the arrival of the retrograde giant contraction (RGC) in the stomach before retching begins. Also, note the tonic activation of the pharynx, esophagus, infrahyoid muscles, and larynx; and relaxation of the suprahyoid muscles just before retching. No swallows occurred during this tonic response. S, swallow; R, retch; V, vomit; HP, hyopharyngeus; TP, thyropharyngeus; CP, cricopharyngeus; MH, mylohyoideus; GH, geniohyoideus; TH, thyrohyoideus; SH, sternohyoideus; ST, sternothyroideus; Cd, cricoarytenoideus; TA, thyroarytenoideus; DH, diaphragmatic hiatus; A3, antrum 3 cm from the pylorus; D5, duodenum 5 cm from pylorus; J50, jejunum 50 cm from pylorus. A3, D5, and J50 are strain gauge recordings and all the rest are electrical recordings. Adapted from Lang et al.
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