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Endocrine system
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=== Hypothalamus === The [[hypothalamus]] maintains homeostasis in the body. It receives input from sources such as the vagus nerve (which can relay information about blood pressure and stomach fullness), the optic nerve (which relays levels of light), receptors in the body and skin (which relay temperature), and even has its own receptors which inform about the amount of molecules in the blood<ref>{{Cite web | url=http://webspace.ship.edu/cgboer/limbicsystem.html | title = The Limbic System | last = Boeree | first = George|website=webspace.ship.edu|access-date=2018-10-18}}</ref> (which relays if there is an unbalanced ratio of fluid to molecules). When the hypothalamus is not functioning properly, many systems become dysregulated. This dysfunction can be caused by a number of different triggers such as an eating disorder, a tumor, brain injury or genetic mutations<ref>{{Cite web | url=https://rarediseases.info.nih.gov/diseases/2932/hypothalamic-dysfunction | title = Hypothalamic dysfunction {{!}} Genetic and Rare Diseases Information Center (GARD) β an NCATS Program|website=rarediseases.info.nih.gov|language=en|access-date=2018-10-18}}</ref>. A malfunctioning hypothalamus alters motivations to drink, eat and copulate which can lead to malnutrition or overeating, dehydration or overhydration and decreased or increased sexual behavior. Sleep patterns, activity levels, and menstruation may also change<ref>{{Cite web | url=https://www.braininjury-explanation.com/consequences/impact-by-brain-area/hypothalamus | title = Hypothalamus / Impact per brain area / Consequences {{!}} Braininjury-explanation.com | website = braininjury-explanation.com|language=|access-date=2018-10-18}}</ref>.
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