hypothalamus Flashcards
hypothalamus regulates
autonomic activity in brainstem and spinal cord
visceral motor system regulates
water/food intake
pituitary function
hypothalamus extends from ____ anteriorly, ___ posteriorly
anterior commissure, lamina terminalis, optic chiasm
mamillary bodies
medially there is
paraventricular zone and arcuate nucleus
ventromedial dorsomedial nuclei
lateral zone including supraoptic nucleus
landmark of anterior hypothalamus
optic chiasm
landmark of middle hypothalamus
infindibulum
landmark of posterior hypothalamus
mamillary bodies
anterior hypothal functions
heat loss thirst water balance, milk ejection, uterine contraction circadian rhythm sleep parasympathomimetric
intermediate hypothal functions
endocrine acitivity
satiety
emotions
posterior hypothal functions
heat conservation arousal aggressive behavior analgesia consolidation of memory
axons in optic nerve terminate where
4 nuclei in brain lateral geniculate nucleus of thalamus superior colliculus of midbrain pretectum of midbrain suprachiasmatic nucleus of hypothal
lateral geniculate nucleus of thalamus for
visual perception
superior colliculus of midbrain for
control of eye movements
pretectum of midbrain for
control of pupillary light reflex
suprachiasmatic nucleus of hypothal for
control of diurnal rhythms and hormonal changes
leptin is
protein produced by fat cells
increased fat cells, ___ .leptin, ___ CNS eating activity
increased
decreased
medial hypothalamic lesions
hyperphalgia
lateral hypothalamic lesions
set point for body weight
hypothalamus temp control center
preoptic area of anterior hypothal
heat sensitive and cold neurons
skin and deep body temp receptors
mainly detect cold and cool temps function to prevent hypothermia
role of posterior hypothal
receives input from ant hypoth and peripheral temp receptors to elicit mainly heat producing and conserving reactions
posterior hypothalamus regulates
body temp set point
paraventricular and supraoptic nuclei regulate
water balance
paraventricular and supraoptic nuclei produce
ADH and oxytocin
paraventricular and supraoptic nuclei destruction
causes diabetes insipidus
paraventricular nucleus projects to
autonomic nuclei of brainstem and spinal cord
anterior nucleus regulates
thermal-heat dissipation
anterior nucleus stimulates
parasympathetic NS
anterior nucleus destruction
hyperthermia
preoptic area contains
sexually dimorphic nucleus
preoptic area regulates
release of gonadotropic hormones
suprachiasmatic nucleus receives
input from retina
suprachiasmatic nucleus controls
circadian rhythm
dorsomedial nucleus stimilation results in
obesity and savage behavior
posterior nucleus regulation
thermal- heat conservation
posterior nucleus destruction results in
inability to thermoregulate
posterior nucleus stimulates
sympathetic NS
lateral nucleus stimulation induces
eating
lateral nucleus destruction results in
starvation
mamillary body receives input from
hippocampal formation via fornix
mamillary body projects to
ant nucleus of thalamus
mamillary body contains
hermorrhagic lesions in wernickes encephalopathy
ventromedial nucleu
satiety center
ventromedial nucleu destruction results in
obesity and savage behavior
arcuate nucleus produces
hypothalamic releasing factors
arcuate nucleus contains
DOPA-ergic neurons that inhibit prolactin release
