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biceps |
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biceps (bī`sĕps), any muscle having two heads, or fixed ends of attachment, notably the biceps brachii at the front of the upper arm and the biceps femoris in the thigh. Originating in the shoulder area, the heads of the biceps merge partway down the arm to form a rounded mass of tissue linked by a tendon to the radius, the smaller of the two forearm bones. When the biceps contracts, the tendon is pulled toward the heads, thus bending the arm at the elbow. For this reason the biceps is called a flexor. It works in coordination with the triceps triceps, any muscle having three heads, or points of attachment, but especially the triceps brachii at the back of the upper arm. One head originates on the shoulder blade and two on the upper-arm bone, or humerus. ..... Click the link for more information. brachii, an extensor. The biceps also controls rotation of the forearm to a palm-up position, as in turning a doorknob. The size and solidity of the contracted biceps are a traditional measure of physical strength. biceps Anatomy any muscle having two heads or origins, esp the muscle that flexes the forearm biceps [′bī‚seps] (anatomy) A bicipital muscle. The large muscle of the front of the upper arm that flexes the forearm; biceps brachii. The thigh muscle that flexes the knee joint and extends the hip joint; biceps femoris. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| They reported that the total number of biceps brachii muscle intrafusal fibers (P=. There are thirty-two segments devoted to a particular muscle, such as temporalis, masseter, sternocleidomastoid, biceps brachii and so on. To probe for changes in cortical potentials, we tested cortical excitability of the biceps brachii muscle in the dominant arm, as measured by resting motor threshold (MT), cortical map area, cortical map volume, and COG of the cortical map. |
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