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

(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.

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.
References in periodicals archive ?
The nerve fibers of the neurohypophysis mainly started from the hypothalamus, and branchily radiated out from internal neurohypophysis to external neurohypophysis.
GCT of the neurohypophysis revealed immunopositivity for S-100 and GFAP, suggesting that it might originate from Schwann cells as the extracranial GCT.
An equivalent concentration of oxytocin is found in the neurohypophysis and plasma of both sexes [26] suggests that oxytocin has further physiological functions.
Astroglial modulation of neurotransmitter/peptide release from the neurohypophysis. J.
This type is readily distinguished not only from pituitary adenoma based on its morphologic features, but also from sellar region meningiomas or pituicytomas, spindle cell oncocytomas, or granular cell tumors of neurohypophysis. However, examples with a paucity of wet keratin (Figure 7, i) or those with such abundant wet keratin that the epithelium is overshadowed (Figure 8, a) can be more challenging.
In the magnocellular neurosecretory system (MNS), CNTF is exclusively expressed in astrocytes of the supraoptic nucleus (SON), which are predominately located in the ventral glial limitans (VGL), and perivascular cells of the neurohypophysis. While the CNTF protein and mRNA levels have been demonstrated to be upregulated in response to injury in vivo (1) and CNTF is widely known to be a neuronal survival factor in vitro, there is a caveat: CNTF lacks a secretory signal sequence and has yet to be demonstrated to be secreted from uninjured cells in vivo.
Another interesting observation is the localization of AQP4 in the neurohypophysis, where osmoreceptors control the release of ADH by an undefined process.
Role of neurohypophysis in the pathogenesis of hypertension and some allied disorders associated with aging.
Un fenomeno similar acontece con las dos porciones de la hipofisis: Adenohypophysis y Neurohypophysis, pues el primer termino utiliza la particula adeno que en griego significa glandula, para denominar a la porcion anterior de la hipofisis que fisiologicamente participa del control hormonal; el segundo termino, por su parte, utiliza la particula neuro, que en griego significa nervio, para denominar a la porcion posterior de la hipofisis que constituye parte del sistema nervioso.
Copeptin, a 39amino acid glycopeptide that comprises the C-terminal part of the AVP precursor, is cosecreted with AVP from the neurohypophysis and is a stable and sensitive surrogate marker for AVP release, making it much easier to measure (8).
Pituicytoma is a distinct low-grade glioma arising from pituicytes of the neurohypophysis and infundibulum.