RT Book, Section A1 Ropper, Allan H. A1 Samuels, Martin A. A1 Klein, Joshua P. A1 Prasad, Sashank SR Print(0) ID 1162593438 T1 The Hypothalamus and Neuroendocrine Disorders T2 Adams and Victor's Principles of Neurology, 11e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9780071842617 LK neurology.mhmedical.com/content.aspx?aid=1162593438 RD 2024/04/24 AB The hypothalamus plays three roles in the actions of the nervous system. First, it serves as the “head ganglion” of the autonomic nervous system, as described in the preceding chapter; second, it is a circadian and seasonal clock for behavioral and sleep–wake functions, as considered in Chap. 18 on sleep; third, it provides neural control of the endocrine system, as discussed in this chapter. The hypothalamus integrates these systems with one another as well as with neocortical, limbic, and spinal networks. Ultimately, the hypothalamus maintains complex homeostatic functions and participates in the substructure of emotion and affective behavior.