Figure 6 - Organizational models.

a: The ipsilateral R1 reflex. b: The contralateral R1 under light anesthesia. c: Demonstrating loss of contralateral R1 under deep anesthesia. d: The crossed adductor reflex pathway in humans. Lt., left; Rt., right; NA, nucleus ambiguus; NTS, nucleus tractus solitarius; iSLN, internal branch of superior laryngeal nerve; RLN, recurrent laryngeal nerve. (Source: Sasaki CT, Jassin B, Kim YH, Hundal J, Rosenblatt W, Ross DA. Central facilitation of glottic closure reflex. Ann Otol Rhino Laryngol 2003;112 (4): 293-297, with permission from Annals Publishing Co.)