. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. 84 THE MUSCLES. of the anterior hali: of the humeras as far as the extremity ; the outer head arises from the outer surface of the humerus. Additional fibi'es, which may be regarded as a fourth origin [m. snhmiconaeus), arise from the upper surface of the hinder half of the humerus. The fibres from these several origins xinite to form a strong muscle, which covers the upper, inner^ and outer surfaces of the bone, and then passes into a tendon. This tendon is attached to the capsule of the elbow-joint and inserted into the prox
. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. 84 THE MUSCLES. of the anterior hali: of the humeras as far as the extremity ; the outer head arises from the outer surface of the humerus. Additional fibi'es, which may be regarded as a fourth origin [m. snhmiconaeus), arise from the upper surface of the hinder half of the humerus. The fibres from these several origins xinite to form a strong muscle, which covers the upper, inner^ and outer surfaces of the bone, and then passes into a tendon. This tendon is attached to the capsule of the elbow-joint and inserted into the proximal extremity of the radio-ulnar. A cartilage, representing the olecranon, is found in the cajDsule at the point of attachment of the tendon. B. Muscles of the Forearm. (I.) Muscles of the flexor surface. The muscles of this surface are arranged in two groups, so as to form, at the elbow-joint, a triangular depression {plica cuhiti), into which the tendon of the m. sternoradlalh sinks. A. Muscles of the Inner Group. 57. M. flexor carpi I -v. radiali-'^ i^^^- 74 rr). Dugès, sous-hmnéro-carpien, n. 83. This represents either the flexor carpi radialis Jongior or radiaUs brevior of man ; it has a broad origin from the inner border of the humerus above the epicondylus medialis. It becomes narrower as it passes downwards to be inserted by a tendon into the o-y wmilunare and uaviciilare. The muscle is much stronger in males than in females, and the crest from which it takes origin is correspondingly larger in the former sex (p. 43). Tendinous fibres connect it with the following miiscles :—. Muscles of tlie right arm of Raiia escule/ita. ed M. extens. digitoruni com- munis. ('« M. abductor digit! 11 longus. Ea' M. flexor antibrachil later- alis superficialis. Fc M. flexor carpi radial. Ff' M. flexor carpi ulnar. Ed M. flexor digitorum com- munis. ?ir Tendon of tlie M. sterno- radialis. 58. carpi Us. ulnari.'i (Fig. 74 Fey Dugès, epitrochlo-carpien, n. 84. This muscle r
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