Applied Anatomy And Kinesiology, the Mechanism of Muscular Movement
The book Applied Anatomy And Kinesiology, the Mechanism of Muscular Movement was written by author Wilbur Pardon Bowen Here you can read free online of Applied Anatomy And Kinesiology, the Mechanism of Muscular Movement book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Applied Anatomy And Kinesiology, the Mechanism of Muscular Movement a good or bad book?
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71). Origin. — Sides of the metacarpals except the first and third. Insertion. — Same as the dorsal interossei, but on the inner rather than the outer surfaces of the phalanges. Action. — Adduction of the fingers, flexion of the first phalanx and extension of the second and third. The muscles that act on the hand are controlled through three nerves, the ulnar, median and musculospiral nerves. The ulnar supplies the ulnar flexors and extensors, the lumbricales and inter- ossei that lie on the ul...nar side of the midfinger, and a part of the flexor profundus. The median supplies the other flexors and the musculospiral the other extensors. Interesting light is thrown on the action of these muscles by the forms of paralysis resulting from disease and injury of these nerves. Ulnar paralysis frequently involves the lumbricales and inter- ossei. When these muscles are paralyzed, especially when no other muscles are involved, the hand takes the claw-like form shown in Fig. 86. The explanation is that when the normal tone of lumbri- cales and interossei is gone the unopposed tension of the extensor communis pulls the first phalanx into a position of overextension while the flexors sublimis and profundus for the same reason produce pronounced flexion of the other two phalanges.
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