The embryological and cytological basis of regional patterns in the definitive epithelial hypophysis of the chick,

Wilson, Margaret Evelyn

doi:10.1002/aja.1000910102

Cited by 33 publications

(2 citation statements)

References 33 publications

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“…Besides, the LH gonadotrops number was also increased with advanced age but they were always fewer in number than the FSH ones. Similar findings were observed by Wilson (1952) and Amin and Gilbert( 1970) in hens. Pageaux et al, (1984) in quail demonstrated a stable low level of plasma estrogen during the first three weeks of life.…”

Section: Immature Chicks From 1 Up To 3 Weeks Oldsupporting

confidence: 89%

Post-Hatching Development of the Pars Distalis of the Adenohypophysis of the Quail (Coturnix coturnix)

El-Sakhawy

Ghareeb

El-Bargeesy

et al. 2012

Journal of Veterinary Anatomy

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A total number of 95 Japanese quails from hatching up to the actively laying stage were used for studying the post hatching developmental changes occurred in the pars distalis. Quail's pars distalis was found to consist of two lobes (cephalic and caudal). All the cell types in the Quail's pars distalis varied during growth sexual maturity and laying. The gonadotrops (FSH and LH) are markedly increased from 4 weeks of age up to laying. Mammotrops appear to increase from 4 weeks till the onset of laying then begin to decrease, however the somatotrops were increased from hatching up to 4 weeks of age only. The thyrotrops became more evident about sexual maturity and laying.

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Section: Immature Chicks From 1 Up To 3 Weeks Oldsupporting

confidence: 89%

Post-Hatching Development of the Pars Distalis of the Adenohypophysis of the Quail (Coturnix coturnix)

El-Sakhawy

Ghareeb

El-Bargeesy

et al. 2012

Journal of Veterinary Anatomy

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“…The avian adenohypophysis also has a characteristic morphology, consisting of the pars distalis, which is divided into two cytologically distinct areas (the cephalic and caudal lobes), and the pars tuberalis, which bridges between the median eminence and anterior pituitary; the median eminence and anterior pituitary are not connected directly, but by the pituitary portal vessels, there being no pars intermedia [Mikami, 1958]. There are a few early reports on how the avian pituitary differentiates to form this morphology during embryonic life [Rahn, 1939;Wilson, 1952], but to our knowledge the process is not well studied.…”

Section: Introductionmentioning

confidence: 99%

Embryonic Development of the Pituitary Gland in the Chick

Sasaki

Doshita²,

Matsumoto³

et al. 2003

Cells Tissues Organs

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Pituitary glands of chicken, from stages 20 (70 ∼ 72 h of incubation) to 46 (20 days) of Hamburger and Hamilton (1951), were studied by immunocytochemical and histological stainings and India ink injection into blood vessels. Using the distribution pattern of 6 types of immunoreactive adenohypophyseal cells and the location of pituitary stalk as guideposts, we found how specific areas in the epithelium of Rathke’s pouch differentiate into specific regions of the adenohypophysis at 20 days. In the sagittal plane, the walls of Rathke’s pouch were tentatively divided into the upper part (A₁ + A₂) and lower part (A₃) of the anterior wall, and the posterior wall (P₁ + P₂ + P₃). The cephalic lobe was mainly assembled by the proliferation of parenchymal cells in the areas A₂ + A₃ + P₂ of Rathke’s pouch epithelia at 3 days of incubation. The caudal lobe was derived from A₁ + P₁ + P₃. The pars tuberalis was derived from A₁ + A₂. Thus, the avian adenohypophysis is established at 13 days, though the blood supply to the pars distalis is established at 20 days. Therefore, the cephalic lobe and caudal lobe of the pars distalis and the pars tuberalis of the chicken adenohypophysis are derived from specific areas of the cell cords of Rathke’s pouch at 3 days of incubation.

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Evidence of early pituitary function in the White Leghorn chick

Phillips

1962

Anat. Rec.

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The embryological and cytological basis of regional patterns in the definitive epithelial hypophysis of the chick,

Cited by 33 publications

References 33 publications

Post-Hatching Development of the Pars Distalis of the Adenohypophysis of the Quail (Coturnix coturnix)

Post-Hatching Development of the Pars Distalis of the Adenohypophysis of the Quail (Coturnix coturnix)

Embryonic Development of the Pituitary Gland in the Chick

Evidence of early pituitary function in the White Leghorn chick

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