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SPORTS ANATOMY LESSON #13
ELBOW FLEXORS
The elbow flexors are: 1) biceps, 2) brachioradialis and 3) brachialis. These muscles are shown in Figure 1 below:
Figure 1. Elbow Flexors.
INNERVATION (NERVE SUPPLY)
The nerve supply to the biceps is from the musculocutaneous nerve and is from branches C5-C7 of the brachial plexus. The nerve supply to the brachioradialis is the from the C5 and C6 branches of the radial nerve. The nerve supply to the brachialis is the musculocutaneous nerve and part of the radial nerve. See Figure 2.
Figure 2. Brachial plexus showing the Musculocutaneous and Radial Nerve.
Function
The biceps, brachioradialis and brachialis muscles function to flex the forearm on the arm at the elbow joint. This movement is common during exercises that involve arm curls.
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Figure 3. Beginning position of arm curl.
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Figure 4. Ending position of arm curl. |
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