Paper - Development and variation of the nerves and the musculature of the inferior extremity and of the neighboring regions of the trunk in man: Difference between revisions

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Bardeen CR. Development and variation of the nerves and the musculature of the inferior extremity and of the neighboring regions of the trunk in man. Am J Anat. 1906;6:259–390.

Development And Variation Of The Nerves And The Musculature Of The Inferior Extremity And Of The Neighboring Regions Of The Trunk In Man

By

Charles R. Bardeen,

Professor of Anatomy, University of Wisconsin, Madison.

With 10 Plates And 7 Text Figures.


In a previous article in this journal (Bardeen and Lewis, 01), an outline was given of the early development of the limbs, body-wall and back in the human embryo. Lewis subsequently, 01, gave a more detailed account of the development of the arm, and I have recently, 05, described at some length the development of the spine and of the skeleton of the leg. The purpose of the following paper is a more detailed account of the development of the nerves and musculature of the leg and of the neighboring regions of the trunk and a consideration of the relation of developmental conditions to variations found in the adult. The embryological studies have been based chiefly on embryos belonging to the collection of Professor Mall of the Johns Hopkins University, who kindly placed them at my disposal. The statistical studies of nerve variation are based upon charts drawn from specimens in the dissecting rooms of the Johns Hopkins University and at the University of Wisconsin.

A. Outline of the Development of the Muscles and Nerves of the Inferior Extremity

I. General Features

For a description of the development of the external form of the limbs and of the chief features which characterize the earlier stages in the internal difierentiation, reference may be made to the three papers mentioned above. The posterior limb-bud is first seen as a massing of the mesenchyme at the posterior extremity of the Wolffian ridge, usually opposite the 21st to the 26th spinal segments. This mesenchyme arises in part from the axial mesenchyme, in part possibly from the somatopleure. There is no good evidence that in the mammals the myotomes contribute directly to it. On the contrary the myotomes are sharply marked off by a limiting membrane from the mesenchyme of the limb-



Cite this page: Hill, M.A. (2024, March 28) Embryology Paper - Development and variation of the nerves and the musculature of the inferior extremity and of the neighboring regions of the trunk in man. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Paper_-_Development_and_variation_of_the_nerves_and_the_musculature_of_the_inferior_extremity_and_of_the_neighboring_regions_of_the_trunk_in_man

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