Hypothalamus/limbic system Flashcards
hypothalamus - function
mnemonic TAN HATS
Thirst and water balance, Adenohypophysis control, Neurohypophysis hormones, Hunger, Autonomic regulation, Temperature regulation, Sexual urges
hypothalamus - inputs
areas not protected by BBB:
- OVLT (organum vasculosum of the lamina terminalis) (senses change in osmolarity)
- area postrema (respond to emetics)
hypothalamus - ADH vs oxytocin sccording to source
Supraoptic nucleus –> ADH
Paraventricular nucleus –> oxytocin
Lateral area of hypothalamus - function
regulates hunger
ventromedial area of hypothalamus - function
regulate satiety
Anterior hypothalamus - function
- cooling
2. parasympathetic
Posterior hypothalamus - function
- heating
2. sympathetic
Suprachiasmatic nucleus of hypothalamus - function
circadian rhythm
destruction of lateral area of hypothalamus –>
- anorexia
2. failure to thrive (infants)
lateral area of hypothalamus - hormones
- inhibited by leptin
- stimulated by ghrelin
ventromedial area of hypothalamus destruction –>
hyperphagia
causes of ventromedial area of hypothalamus destruction
craniopharyngioma
ventromedial area of hypothalamus - hormones
stimulated by leptin
hypothalamus - parasympathetic and sympathetic are regulated by
- parasympathetic: anterior hypothalamus
2. sympathetic: posterior hypothalamus
hypothalamus - circadian rhythm is controlled by
Suprachiasmatic nucleus of hypothalamus
hypothalamus - heating and cooling are controlled by
- cooling: anterior hypothalamus
2. heating: posterior hypothalamus
OVLT function
senses changes in osmolarity
Limbic system - definition/function/responsible/structures
collection of neural structures involved in emotion long-term memory, oflaction, behavior modulation, ANS function (1.feeding 2.fleeing 3.fighting 4. feeling 5. sex)
structures: 1. hippocampus 2. amygdala 3. fornix
4. mammillary bodies 5. cingulate gyris
Limbic system - structures
- hippocampus 2. amygdala 3. fornix
4. mammillary bodies 5. cingulate gyris
Limbic system - responsible for
- feeding 2. fleeing 3. fighting 4. feeling 5. sex
Limbic system is a collection of neural structures involved in
- emotion
- long-term memory oflaction
- behavior modulation
4 ANS function