Hypothalamus info Flashcards
What is the role of the hypothalamus:
Maintains homeostasis by regulating: Thirst and water balance Controlling Adenohypophysis Controlling Neurohypophysis Regulating Hunger Regulating ANS Regulating Temperature Regulating Sexual urges
What does the Hypothalamus receive inputs from
OVLT: sense changes in osmolarity
Area Postrema: in medulla responds to emetics
What is the function of and what regulates:
Lateral nucleus
Hunger
Stimulated by ghrelin, inhibited by leptin
What is the function of and what regulates:
Ventromedial nucleus
Satiety
Stimulated by Leptin
What is the function of:
Anterior Nucleus
Cooling, Parasympathetic
What is the function of:
Posterior nucleus
Heating, Sympathetic
What is the function of:
Suprachiasmatic nucleus
Circadian Rhythm
What is the function of:
Supraoptic and paraventricular nuclei
Synthesize ADH and Oxytoci
What is the function of:
Preoptic nucleus
Thermoregulation, sexual behavior, releases GnRH
A defect/damage to would result in?
Lateral nucleus
Anorexia and failure to thrive (infants)
Lateral injury makes you lean
A defect/damage to would result in?
Ventromedial nucleus
Hyperphagia (can be damaged by craniopharyngioma)
VentMed injury makes you Very Massive
A defect/damage to would result in?
Preoptic nucleus
Kallmann syndrome
Failure of neurons to migrate causes hypogonadotropic hypogonadism and anosmia (low GnRH, FSH, LH, Test, and infertility/low sperm ct/amenorrhea)
