BRAIN STRUCTURES REGULATINGcontrol of the autonomic nervous system. Other brain GASTROINTESTINAL FUNCTIONS nuclei such as raphe pallidus, nucleus dorsalis, and nucleus obscurus send projections to the NTS that contain
LOCALIZATION OF BRAIN STRUCTURESserotonin (5-HT) and constitute a major pathway for nociceptive messages.10.11 Among the hypothalamic nu-The nucleus tractus solitarius (NTS) is the ma-jor clei, the DMH, PVN and VMH are the most prominent projection target of vagal afferent fibers and, in turn, structures that send projections to the N T S .~~ Electroprojects to the dorsal motor nucleus of the vagus physiologic studies give evidence of an interaction be-
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