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extensor muscle
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An anatomical illustration of the top of a human foot shows a superficial dissection with muscles, tendons, and nerves labeled, including the extensor muscles, fibularis tendons, and branches of the fibular (peroneal) nerve. The Human Body
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An anatomical illustration of the top of a human foot shows a superficial dissection with muscles, tendons, and nerves labeled, including the extensor muscles, fibularis tendons, and branches of the fibular (peroneal) nerve.
muscles, tendons, and nerves of the human foot Dorsal view of the right foot, showing major muscles, tendons, and nerves.

extensor muscle

anatomy
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History

extensor muscle, any of the muscles that increase the angle between members of a limb, as by straightening the elbow or knee or bending the wrist or spine backward. The movement is usually directed backward, with the notable exception of the knee joint. In humans, certain muscles of the hand and foot are named for this function. In the hand these include the extensor carpi radialis brevis, extensor carpi radialis longus, and extensor carpi ulnaris,...

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