NETTER - Neuroscience Flash Cards

Hypophysial Portal Vasculature
1. Hypothalamic vessels
2. Superior hypophysial artery
3. Efferent vein to the cavernous sinus
4. Anterior lobe of the pituitary gland
5. Secondary plexus of hypophysial portal system
6. Inferior hypophysial artery
7. Posterior lobe of the pituitary gland
8. Capillary plexus of the infundibular process
9. Short hypophysial portal veins
10. Long hypophysial portal vein
11. Primary plexus of hypophysial portal system
Comment: The hypophysial portal vascular system derives
from arterioles entering the median eminence at the base of the
hypothalamus. The primary capillary plexus is the site where central
axons release their inhibitory factors and releasing factors for
anterior pituitary hormones (neurocrine secretions), which in turn are
delivered in very high concentrations through the venules into the
secondary capillary plexus to bathe cells that synthesize and secrete
anterior pituitary hormones into the general circulation.
Systemic Neuroscience See book 16.15