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. Author manuscript; available in PMC: 2010 Aug 31.
Published in final edited form as: Respir Physiol Neurobiol. 2009 May 27;168(1-2):133–143. doi: 10.1016/j.resp.2009.05.010

Figure 2. The Medullary 5-HT System in the Human Brainstem.

Figure 2

The Medullary 5-HT System consists of 5-HT neurons (areas in red) in the midline raphé (i.e., raphé obscurus (Rob), extra-raphé (i.e., (gigantocellularis [GC], paragigantocellularis lateralis [PGCL], intermediate reticular nucleus [IRZ], and at the ventral medullary surface (arcuate nucleus [Arc]) and sites to which they project (blue areas) that do not contain 5-HT neurons but mediate homeostatic functions (e.g., hypoglossal nucleus [HG], nucleus of the solitary tract [NTS]). Figure shows coronal sections at the level of the Caudal, Mid, and Rostral medulla.