Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 50
pect, these two muscles must beopposed to and antagonize each other. This belief is foundedon what I regard as an erroneous assumption, viz., that muscleshave only the power of shortening, and that when onemuscle, say the flexor, shortens, it must drag out and forciblyelongate the corresponding… … Fio. 5. Shows the muscular cycle formed by the biceps (a) or flexor muscle,and the triceps (h) or extensor muscle of the human arm. At i the centri-petal or shortening action of the biceps is seen, and atj the centrifugal orelongating action of the triceps (vide arrows). The present figure…
Animal locomotion · Aeronautics
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