hypothalamus Flashcards
what is the hormone:
bonding, love, “feel good”
released during organism
nipple stimulation → milk let down from gland to duct
uterine contractions → cervical dilation, reduce size (↓ bleeding after delivery)
oxytocin
what is the hormone:
↑ secretion in winter (shorter days)
suppresses production of FSH/LH → ↓ libido in winter
↓ secretion in spring (sun) → ↑ libido, mate
follows circadian rhythm of suprachiasmatic nucleus (peak secretion at midnight, tapers during day)
melatonin
what secretes melatonin
pineal gland
amygdala inputs
limbic cortex auditory + visualization association areas parietal lobe temporal lobe occipital obe
amygdala outputs
cortical areas of inputs
hippocampus - memory
thalamus
hypothalamus
what structure is responsible for:
signal to autonomic NS to control arterial blood pressure + HR
GI motility + secretion, defecation, urination
secretion of anterior pituitary hormones
eating: lick, chew, swallow
negative emotions: range, invasion of personal space, fear
sex response: erection, copulatory movements, ejaculation
amygdala
structures of limbic system
hippocampus amygdala fornix mamillary bodies cingulate gyrus septal nucleus
structures of limbic system
hippocampus amygdala fornix mamillary bodies cingulate gyrus septal nucleus connected to pleasure centers (emotion), prefrontal cortex (executive function, personality, problem solving, inhibition of limbic system)
lesion of mammillary bodies causes
Wernicke Korsakoff Syndrome
what causes:
amensia + confabulation
ataxia
nystagmus
Wernicke Korsakoff Syndrome (lesion of mammillary bodies due to thiamine deficiency)
lesion of bilateral amygdala causes
Kluver-Bucy Syndrome
what causes: hyperorality - eat solid objects hypersexuality disinhibition - no fear, lose focus curiosity docile
Kluver-Bucy Syndrome (lesion of bilateral amygdala, associated with HSV-1 in amygdala)
savage behavior + obesity result from stimulation
dorsomedial nucleus
savage behavior + obesity result from damage
ventromedial nucleus
stimulation leads to eating + destruction leads to anorexia
lateral nuclei
