. Anatomy, descriptive and applied. Anatomy. THE TIIilOTARSAL ARTICULATION 345 external malleolus downward and slightly backward to the peroneal spine on the outer surface of the calcaneus. It is covered by the tendons of the Peroneus longus and brevis. Synovial Membrane.—The synovial membrane (Fig. 272) invests the inner surface of the ligaments, and sends a duplicature upward between the lower extremities of the tibia and fibula for a short distance. Relations.—The tendons, vessels, and nerves in connection with the joint are, in front, from within outward, the Tibialis anticus. Extensor pro
. Anatomy, descriptive and applied. Anatomy. THE TIIilOTARSAL ARTICULATION 345 external malleolus downward and slightly backward to the peroneal spine on the outer surface of the calcaneus. It is covered by the tendons of the Peroneus longus and brevis. Synovial Membrane.—The synovial membrane (Fig. 272) invests the inner surface of the ligaments, and sends a duplicature upward between the lower extremities of the tibia and fibula for a short distance. Relations.—The tendons, vessels, and nerves in connection with the joint are, in front, from within outward, the Tibialis anticus. Extensor proprius hallucis, anterior tibial vessels and nerve, Extensor longus digitorum, and Peroneus tertius; behind, from within outward, the Tibialis posticus. Flexor longus digitorum, posterior tibial vessels and nerve, Flexor longus hallucis; and in the groove behind the external malleolus, the tendons of the Peroneus longus and brevis. The arteries supplying the joint are derived from the malleolar branches of the anterior tibial and the peroneal. The nerves are derived from the anterior and posterior tibial. Inferior tibiofibular Fig, 27G.—Ankle-joint: tarsal and tarsometatarsal articulations. External ? Right side. Movements.—The movements of the joint are those of flexion and extension. Flexion con- sists in the apjiroximation of the dorsum of the foot to the front of the leg, while in extension the heel is drawn up and the toes pointed downward. The malleoli tightly embrace the astragalus in all positions of the joint, so that any slight degree of lateral movement which may exist is • simply due to stretching of the inferior tibiofibular ligaments and slight bending of the shaft of the filDula. Of the ligaments, the internal is of very great strength—so much so that it usually resists a force which fractures the process of bone to which it is attached. Its middle portion, together with the middle fasciculus of the external lateral ligament, binds the b
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
