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pars tuberalis adenohypophyseos


Definition: the upward extension of the anterior lobe of the pituitary gland that wraps around the infundibular stalk; its cells, mostly gonadotropic, are arranged in cords and clusters; it is supplied by the superior hypophysial arteries and contains the first (primary) capillary bed and the venules of a portal system that carries neurosecretory factors from the hypothalamus to a second (secondary) capillary bed in the adenohypophysis, where these factors regulate the release of hormones.

Synonym(s): infundibular part, pars infundibularis

See Also: pituitary gland

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.