hypothalamus Flashcards Preview

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Flashcards in hypothalamus Deck (23):
1

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

2

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

3

what secretes melatonin

pineal gland

4

amygdala inputs

limbic cortex
auditory + visualization association areas
parietal lobe
temporal lobe
occipital obe

5

amygdala outputs

cortical areas of inputs
hippocampus - memory
thalamus
hypothalamus

6

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

7

structures of limbic system

hippocampus
amygdala
fornix
mamillary bodies
cingulate gyrus
septal nucleus

8

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)

9

lesion of mammillary bodies causes

Wernicke Korsakoff Syndrome

10

what causes:
amensia + confabulation
ataxia
nystagmus

Wernicke Korsakoff Syndrome (lesion of mammillary bodies due to thiamine deficiency)

11

lesion of bilateral amygdala causes

Kluver-Bucy Syndrome

12

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)

13

savage behavior + obesity result from stimulation

dorsomedial nucleus

14

savage behavior + obesity result from damage

ventromedial nucleus

15

stimulation leads to eating + destruction leads to anorexia

lateral nuclei

16

stimulation leads to ADH (vasopressin) release + destruction results in diabetes insipidus

supraoptic nucleus

17

the "master clock" for setting circadian rhythm

suprachiasmatic nucleus

18

responsible for sweating (cooling)

anterior nucleus

19

responsible for shivering (heating)

posterior nucleus

20

release of oxytocin, CRH, TRH

paraventricular nuclei

21

release hormones affected anterior pituitary

preoptic nucleus: GnRH
paraventricular nucleus: CRH, TRH
arcuate nucleus: pulsatile GnRH

22

causes satiety and stimulated by leptin

ventromedial nucleus

23

makes hungry and inhibited by leptin (satiety)

lateral nucleus

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