neurohypophysis


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neurohypophysis

 [noor″o-hi-pof………´…ĭ-sis]
the posterior lobe of the pituitary gland. adj., adj neurohypophys´eal.
The neurohypophysis (posterior pituitary gland). From Applegate, 2000.

neu·ro·hy·poph·y·sis

(nū'rō-hī-pof'i-sis), [TA]
Complex comprising the infundibulum and the nervous lobe of the hypophysis.
See also: pituitary gland.
[neuro- + hypophysis]

neurohypophysis

/neu·ro·hy·poph·y·sis/ (noor″o-hi-pof´ĭ-sis) the posterior (or neural) lobe of the pituitary gland, which stores oxytocin and vasopressin.neurohypophys´ial

neurohypophysis

(no͝or′ō-hī-pŏf′ĭ-sĭs, -hĭ-, nyo͝or′-)
n. pl. neurohypophy·ses (-sēz′)
The posterior portion of the pituitary gland, having a rich supply of nerve fibers and releasing oxytocin and vasopressin.

neu′ro·hy′po·phys′e·al, neu′ro·hy′po·phys′i·al (-hī′pə-fĭz′ē-əl, -hĭp′ə-, -hĭ-pŏf′ə-sē′əl) adj.

neurohypophysis

[-hīpof′isis]
Etymology: Gk, neuron + hypo, under, phyein, to grow
the posterior lobe of the pituitary gland that is the release point of antidiuretic hormone (ADH) and oxytocin. Nervous stimulation from the hypothalamus controls the release of the substances into the blood. When stimulated by the hypothalamus, the neurohypophysis releases ADH by an increase in the osmotic pressure of extracellular fluid in the body. The hormone acts on the cells in the distal and collecting tubules of the kidneys, making them more permeable to water and thus reducing the volume of urine. The neurohypophysis releases oxytocin under appropriate stimulation from the hypothalamus. Oxytocin produces powerful contractions of the pregnant uterus and causes milk to flow from lactating breasts. Stimulation of the nipples of the breast by a nursing infant triggers the release of this hormone. Also called posterior pituitary gland. Compare adenohypophysis.

neu·ro·hy·poph·y·sis

(nūr'ō-hī-pof'i-sis) [TA]
A neuroendocrine structure suspended from the base of the hypothalamus. It is composed of the infundibulum and the posterior lobe of the hypophysis.
See also: hypophysis
Synonym(s): lobus posterior hypophyseos [TA] , posterior lobe of hypophysis.

neurohypophysis

see PITUITARY GLAND.

neurohypophysis

the posterior lobe of the pituitary gland. It stores and secretes two hormones, oxytocin and antidiuretic hormone (vasopressin), which are released in response to neural stimulation.
References in periodicals archive ?
Neurohypophysial GCT originated from the pituicytes which are modified as gliocytes of ependymal cell lineage located in the neurohypophysis and pituitary stalk.
Pituicytoma and spindle cell oncocytoma show spindle cells with low nuclear to cytoplasmic ratios and varying amounts of eosinophilic cytoplasm, with granular cell tumor of neurohypophysis further demonstrating granular cytoplasmic change similar to that seen in granular cell tumors elsewhere in the body due to an accumulation of lysosomes.
Morphological adaptability at neurosecretory axonal endings on neurovascular contact zone of the rat neurohypophysis.
In addition, the “bright spot” of the neurohypophysis was not visible on sagittal T1-WI [Figure 1]a and [Figure 1]b.
Axons of supraoptic and paraventricular nuclei of the hypothalamus traverse the infundibular stalk and extend into the neurohypophysis.
Neurohypophysis The posterior lobe of the pituitary gland.
It has been suggested that V2 receptors, not V1 receptors, are localized near the anterio-ventral third ventricle and the paraventriculal, supraoptic, suprachiasmatic nuclei, and neurohypophysis of the hypothalamus (Cheng & North, 1989; Gerstberger & Fahrenholz, 1989).
So far the use of patch electrodes on vertebrate nerve terminals has been possible only with isolated peptidergic endings of 1-10 [[micro]meter] diameter from rat neurohypophysis (Lemos and Nowycky, 1989) and with the giant, cholinergic, calyx synapse of the chick ciliary ganglion (Stanley, 1991).
The storage of AVP in hypothalamic nuclei and the neurohypophysis has been shown to increase with age |26, 27~.
The disorders of water metabolism and osmoregulation are often associated with surgery in the sellar region probably due to manipulation or vascular alterations of the neurohypophysis (1).
The adenohypophysis is a red-brown epithelial gland; the neurohypophysis is a firm grey neural structure that is composed of axons of hypothalamic neurons and their supporting stroma.