File:The horse in motion - as shown by instantaneous photography - with a study on animal mechanics founded on anatomy and the revelations of the camera - in which is demonstrated the theory of quadrupedal (14578813737).jpg

Identifier: horseinmotionass01stil (find matches)
Title: The horse in motion : as shown by instantaneous photography : with a study on animal mechanics founded on anatomy and the revelations of the camera : in which is demonstrated the theory of quadrupedal locomotion
Year: 1882 (1880s)
Authors: Stillman, J. D. B. (Jacob Davis Babcock), 1819-1888 Muybridge, Eadweard, 1830-1904
Subjects: Horses Horses Animal locomotion
Publisher: Boston : J.R. Osgood
Contributing Library: Boston Public Library
Digitizing Sponsor: Boston Public Library

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onding position on the leg to that of the triceps onthe thigh, as well as to the levers on which they act; but while theaction of the triceps is very simple and easily comprehended, that ofthe muscles of the calf is very complicated, and can only be understoodby a study of the whole limb as a machine of which the voluntarymuscles form a part. Whether it will be possible for me to interpretthe action of the muscles and the use of the tendons with their checksand reinforcements without the actual limb before us is a question tobe determined. An attempt was made to represent the parts by theaid of the camera, but the results were not satisfactory. Plate X. isfrom a careful drawing by Hahn. The gastrocnemius of the right side,g, is dissected away from its origin in the femur and raised by hooksto show the perforatus tendon,/*. This tendon is inserted into thefemur about two inches from the joint, along with the gastrocnemiimuscles. It has a muscular body of its own, not distinguishable in
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C^ THE HORSE JN MOTION. 49 the drawing, being there confounded with the body of the muscle lyingupon it. On their way to their insertion into the point of the hock thetendons of these two muscles are twisted upon each other half round, sothat the perforatus tendon, which was beneath, reaches its insertion atthe outside of that of the gastrocnemius. The tendon of the latter isfixed immovably to the bone, and acts to extend the metatarsus belowit, but the tendon of the perforatus passes over the point of the hock,where it is provided with a pulley similar to that at the knee, overwhich it glides to a very limited extent, being strongly secured by liga-ments to the point of the hock, h\ it then passes down behind themetatarsus, or cannon bone, to the pastern, or fetlock joint, where itthrows out a ring to encircle the tendon of the perforaus^ as seen atr. (These two tendons, forming the back sinews, would be liable,from the extreme flexions and extensions which take place at thatjoint, t

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