Flashcards in Lecture 1 - Hypothalamus/Pituitary 1 Deck (11):
forebrain -> diencephalon -> hypothalamus
Blood vessels - anterior pituitary
superior hypophyseal artery -> hypophyseal portal veins -> anterior hypophyseal veins
Blood vessels - posterior pituitary?
inferior hypophyseal artery -> capillary plexus of infundibular process -> posterior hypophyseal vein
Axons of the posterior pituitary>?
non-myelineated for neurosecretory purposes, cell bodies in the hypothalamus
Growth hormone inhibiting hormone pathway?
periventricular nucleus release GHIH which inhibits anterior lobe releasing GH stimulating liver which leads to (decreased) skeletal muscle, cartilage and other tissue growth - IGF-1 positively feedsback
Growth hormone releasing hormone pathway?
arcuate nucleus release GHRH stimulating anterior lobe, releasing GH which stimulates liver - IGF-1 negatively feeds back
ilk production - anterior lobe
milk letdown - posterior lobe
Positive feedback of titties?
suckling on mammary gland triggers signal up spinal cord, positively feeding back further release
Tubero-infundibular dopamine neurons?
prolactin positively feeds back these neurons increasing DA in median eminence inhibiting prolactin production - placental lactogens inhibit DA