Henry gray

Fracture of the patella may be produced by muscular action or by direct violence. When produced by muscular action, it occurs thus: a person in danger of falling forwards attempts to recover himself by throwing the body backwards, and the violent action of the quadriceps extensor upon the patella snaps the bone transversely across.

Gray, Henry (b. London[?], England, 1825/1827; d. London, 8/13 June 1861) anatomy, physiology. For a name as well-known as Gray’s, extremely little is known about the man. He was one of four children of a private messenger to Gray finished his medical studies and qualified as a member of the Royal College of Surgeons in 1849, and in June of the following year he was appointed house surgeon at St. George’s Hospital for the customary twelve months. Most of Gray’s professional career was oriented around St. George’s; in 1852 he was demonstrator of anatomy, and after 1853 he was lecturer in anatomy. He was also curator of the St. George’s Hospital Museum. In 1852, after publication of his two major papers in the Philosophical Transactions, Gray was elected fellow of the Besides his Anatomy Gray published several writings, the earliest of which was “On the Development of the Retina and Optic Nerve, and of the Membranous Labyrinth and Auditory Nerve,” which incorporated some of the material in his prize essay. His observations were almost exclusively on the chick embryo. He clearly demonstrated that the retina develops from a protrusion of the brain, a point then still being debated. Gray also presented one of the earliest major accounts of the development of the layers of the retina. The labyrinth, he believed, develops in a mode analogous to that of the retina. Gray’s other anatomical paper was “On the Development of the Ductless Glands in the Chick,” in which he dealt with th...

Pages where the terms " Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding. (More? Contents • 1 Introduction • 2 Textbook Introduction • 2.1 Systematic Anatomy • 2.2 Embryology • 3 Development • 3.1 301-400 • 4 Cardiovascular • 5 Lymphatic • 6 Neural • 7 Smell • 8 Vision • 9 Hearing • 10 Somatosensory • 11 Integumentary • 12 Respiratory • 13 Gastrointestinal • 14 Urogenital • 15 Endocrine • 16 Surface Anatomy • 17 Glossary Links Introduction Classic anatomy textbook widely reproduced online, particularly the anatomical illustrations, due to the fact that the 1918 edition is out of copyright. W.H. Lewis edited the 20th edition published in September 1918, the current 40th edition was published in 2008. The majority of images were anatomical drawings with some cartoon simplifications. The text also includes earlier historic drawings, particularly in the embryology section that commences the text. Clicking the Links: iBooks iBook - Gray's Embryology • • Description - an...