Boundary between the anterior and posterior lobes of the pituitary
Pars intermedia
Median sagittal through the hypophysis of an adult monkey. (Pars intermedia labeled at bottom center.)
Details
Identifiers
Latin
pars intermedia adenohypophyseos
TA98
A11.1.00.004 A09.4.02.017
TA2
3858
TH
H3.08.02.2.00007
FMA
74632
Anatomical terminology
[edit on Wikidata]
Pars intermedia is seen between pars distalis and pars nervosa.
Pars intermedia is the boundary between the anterior and posterior lobes of the pituitary. It contains colloid-filled cysts and two types of cells - basophils and chromophobes. The cysts are the remainder of Rathke's pouch. As technically part of the anterior pituitary, it separates the posterior pituitary and pars distalis. It is composed of large, pale cells that encompass the aforementioned colloid-filled follicles.[1]
In human fetal life, this area produces melanocyte stimulating hormone or MSH which causes the release of melanin pigment in skin melanocytes (pigment cells). However, the pars intermedia is normally either very small or entirely absent in adulthood.
In lower vertebrates (fish, amphibians), MSH from the pars intermedia is responsible for darkening of the skin, often in response to changes in background color. This color change is due to MSH stimulating the dispersion of melanin pigment in dermal (skin) melanophore cells.
^Ilahi, Sadia; Ilahi, Tahir B. (3 October 2022). "Anatomy, Adenohypophysis (Pars Anterior, Anterior Pituitary)". Anatomy, Adenohypophysis (Pars Anterior, Anterior Pituitary). StatPearls Publishing. Retrieved 9 February 2023.
Parsintermedia is the boundary between the anterior and posterior lobes of the pituitary. It contains colloid-filled cysts and two types of cells - basophils...
three parts: the pars nervosa, the parsintermedia, and the pars distalis. The most critical structure to PPID, the parsintermedia, is regulated by the...
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specifically exclude it from the pituitary. A few sources include the parsintermedia as part of the posterior lobe, but this is a minority view. It is based...
of the urethra (unlabeled) Details Identifiers Latin parsintermedia urethrae masculinae, pars membranacea urethrae masculinae FMA 19674 Anatomical terminology...
the pouch to form the pars distalis and the pars tuberalis. The posterior wall of the anterior pituitary forms the parsintermedia. Its formation from the...
into the pars tuberalis (pars infundibularis) and pars distalis (pars glandularis) that constitutes ~80% of the gland. The parsintermedia (the intermediate...
pergolide – dopamine receptor agonist used for the treatment of pituitary parsintermedia dysfunction in horses phenobarbital – anti-convulsant used for seizures...
terminates as the glans. The RSP is also connected to the shaft via the parsintermedia (venous plexus of Kobelt). When engorged with blood, the bulbs cuff...
to ensure a contiguous line upon healing. Details Identifiers Latin parsintermedia labiorum oris TH H3.04.01.0.00010 Anatomical terminology [edit on Wikidata]...
tapered and joined to one another (the commissure of the bulbs) by the parsintermedia; their deep surfaces are in contact with the inferior fascia of the...
improper insulin regulation, and is most commonly seen with pituitary parsintermedia dysfunction (also called equine Cushing's syndrome) and equine metabolic...
from beta-lipotropin and a larger molecular weight precursor in rat parsintermedia". Proceedings of the National Academy of Sciences of the United States...
the trade name Prascend, is permitted for the treatment of pituitary parsintermedia dysfunction (PPID) also known as equine Cushing's syndrome (ECS) in...
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