. Anatomy, descriptive and applied. Anatomy. 346 THE ARTICULATIONS, OB JOINTS Extension of the tarsal bones upon the tibia and fibula is produced by theGast; ),?neinius Soleus, Plantaris, Tibialis posticus, Peroneus longus and brevis, Flexor longus digitcium, and Flexor longus hallucis; flexion, by the Tibialis anticus, Peroneus tertius. Extensor longus dio-itorum, and Extensor proprius hallucis' (Fig. 268); inversion, in the extended position, is produced by the Tibialis anticus and posticus; and eversion by the Peronei. Surface Form.—The line of the ankle-joint may be indicated by a transver
. Anatomy, descriptive and applied. Anatomy. 346 THE ARTICULATIONS, OB JOINTS Extension of the tarsal bones upon the tibia and fibula is produced by theGast; ),?neinius Soleus, Plantaris, Tibialis posticus, Peroneus longus and brevis, Flexor longus digitcium, and Flexor longus hallucis; flexion, by the Tibialis anticus, Peroneus tertius. Extensor longus dio-itorum, and Extensor proprius hallucis' (Fig. 268); inversion, in the extended position, is produced by the Tibialis anticus and posticus; and eversion by the Peronei. Surface Form.—The line of the ankle-joint may be indicated by a transverse line drawn across the front of the lower part of the leg, about half an inch above the level of the tip of the internal malleolus. Applied Anatomy.—Displacement of the trochlear surface of the astragalus from the tibio- fibular mortise is not of common occurrence, as the ankle-joint is a very strong and powerful articulation, and great force is required to produce dislocation. Nevertheless, dislocation does occasionallv occur, both in antero-posterior and a lateral direction. In the latter, which is the most common, fracture is a necessary accompaniment of the injury. The dislocation in these cases is somewhat peculiar, and is not a displacement in a horizontally lateral direction, such as usually occurs in lateral dislocations of ginglymoid joints, but the astragalus undergoes a partial rotation around an antero-posterior axis drawn through its own centre, so that the superior surface, instead of being directed upward, is inclined more or less inward or outward accordinji to the variety of the Fig. 277.—Section of the right foot near its inner border, dividing the tibia, astragalas, calcaneus, scaphoid internal cuneiform, and first metatarsal bone, and the first phalanx of the great toe. (After Braune.) The ankle-joint is more frequently sprained than any other joint in the body, and this may- lead to acute synovitis. In these cases, when the synovial s
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
