Paper - The development of the hypophysis cerebri of the rabbit: Difference between revisions
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==Introduction== | ==Introduction== | ||
Notwithstanding the numerous studies to which the hypophysis has been subjected, many of its deeper problems remain unsolved. Few investigators have confined themselves to the development of the gland in a single species. This is due, no doubt, to the alluring possibilities in broad comparative studies. As a consequence, many sweeping and unwarranted conclusions have been drawn from insufiicient observations, or from observations on a few specimens in widely different vertebrate classes. | |||
The recent recognition of a distinctive third epithelial portion of the gland lying under the membranes of the brain in the region of the tuber cinereum—the ‘pars tuberalis’ of Tilney (’l3)—and the as yet imperfect appreciation of its interesting development, make careful ontogcnctic studies highly desirable as the basis for phylogenetic comparisons. | |||
The Work which forms the basis of the present paper was undertaken in an attempt to trace the development of the hypophysis with reasonable completeness in a single mammal. To this end the rabbit (''Lepus cuniculus L.'') was chosen, since this animal breeds Well in confined quarters, has a short gestation period, and brings forth its young in large litters. These factors combine to make possible the collection of the carefully timed embryological material so essential to chronological studies in development. | |||
This study will treat particularly of the morphogenesis of the hypophysis from the time of its appearance until birth, giving especial attention to the ontogeny of the ‘pars tuberalis’ and to the development of the neural lobe; it will deal also with the differentiated histological structure of the three parts of the epithelial hypophysis at the time of birth, and finally will attempt to relate certain of the author’s observations to those of other investigators. | |||
I desire to express my sincere thanks to Professor Huber for his continued interest in this Work, for his very material assistance in overcoming technical difficulties, and for the unstinting Way in which he has placed the excellent facilities of the anatomical laboratories at my disposal. My wife has given valuable aid in much of the tedious Work connected with the construction of the wax models. | |||
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[[Category:Pituitary]][[Category:Rabbit]][[Category:1910's]] | [[Category:Pituitary]][[Category:Rabbit]][[Category:1910's]] | ||
Revision as of 12:01, 9 November 2016
Embryology - 25 Jun 2024    Expand to Translate
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Atwell WJ. The development of the hypophysis cerebri of the rabbit (Lepus Cuniculus L.). (1918) Amer. J Anat. 24(2): 271-337
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 See also Atwell WJ. The development of the hypophysis cerebri in man, with special reference to the pars tuberalis. (1926) Amer. J Anat. 37: 139-193. Links: Pituitary Development | Rabbit Development |
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The Development of the Hypophysis Cerebri of the Rabbit (Lepus Cuniculus L.)
1. Introduction 2. Review of literature
- A. Special questions concerned with the development of the hypophysis
- 1. Entodermal origin
- 2. The relation of the notochord to the hypophysis
- 3. The lobes of the hypophysis
- a) General
- b) The anterior process
- c) The lateral lobes
- d) The relation of the lateral lobes to the 'pars tuberalis'
- 4. The structure of the intermediate part
- 5. The development of the neural lobe
- B. The development of the hypophysis of the rabbit
3. Material and methods 5. Discussion of observations
- A. The relation of the entoderm and the notochord to the hypophysis
- B. Some general features of the development of the hypophysis
- 1. The hypophysial stalk
- 2. The residual lumen
- D. The development of the neural lobe
- E. The neuro-epithelial contacts and their significance
- F. Terminology and phylogeny of the lobes of the hypophysis
6. Summary and conclusions 7. Literature cited
Introduction
Notwithstanding the numerous studies to which the hypophysis has been subjected, many of its deeper problems remain unsolved. Few investigators have confined themselves to the development of the gland in a single species. This is due, no doubt, to the alluring possibilities in broad comparative studies. As a consequence, many sweeping and unwarranted conclusions have been drawn from insufiicient observations, or from observations on a few specimens in widely different vertebrate classes.
The recent recognition of a distinctive third epithelial portion of the gland lying under the membranes of the brain in the region of the tuber cinereum—the ‘pars tuberalis’ of Tilney (’l3)—and the as yet imperfect appreciation of its interesting development, make careful ontogcnctic studies highly desirable as the basis for phylogenetic comparisons.
The Work which forms the basis of the present paper was undertaken in an attempt to trace the development of the hypophysis with reasonable completeness in a single mammal. To this end the rabbit (Lepus cuniculus L.) was chosen, since this animal breeds Well in confined quarters, has a short gestation period, and brings forth its young in large litters. These factors combine to make possible the collection of the carefully timed embryological material so essential to chronological studies in development.
This study will treat particularly of the morphogenesis of the hypophysis from the time of its appearance until birth, giving especial attention to the ontogeny of the ‘pars tuberalis’ and to the development of the neural lobe; it will deal also with the differentiated histological structure of the three parts of the epithelial hypophysis at the time of birth, and finally will attempt to relate certain of the author’s observations to those of other investigators.
I desire to express my sincere thanks to Professor Huber for his continued interest in this Work, for his very material assistance in overcoming technical difficulties, and for the unstinting Way in which he has placed the excellent facilities of the anatomical laboratories at my disposal. My wife has given valuable aid in much of the tedious Work connected with the construction of the wax models.
Cite this page: Hill, M.A. (2024, June 25) Embryology Paper - The development of the hypophysis cerebri of the rabbit. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Paper_-_The_development_of_the_hypophysis_cerebri_of_the_rabbit
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
