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Peroneus brevis
The peroneus brevis muscle (or fibularis brevis) lies under cover of the peroneus longus, and is a shorter and smaller muscle.
==Structure==
It arises from the lower two-thirds of the lateral surface of the body of the fibula; medial to the peroneus longus; and from the intermuscular septa separating it from the adjacent muscles on the front and back of the leg.
The fibers pass vertically downward, and end in a tendon which runs behind the lateral malleolus along with but in front of that of the preceding muscle, the two tendons being enclosed in the same compartment, and lubricated by a common mucous sheath.
It then runs forward on the lateral side of the calcaneus, above the calcaneal tubercle and the tendon of the peroneus longus, and is inserted into the tuberosity at the base of the fifth metatarsal bone, on its lateral side. A small clinical important point is that when the base of the fifth metatarsal is fractured, the peroneus brevis may pull on and displace the proximal fragment. (See Jones Fracture)
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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