Final answer:
The brachioradialis muscle does NOT cause flexion at the elbow; it assists in other movements. The biceps brachii, brachialis, and brachioradialis muscles are involved in flexing the forearm.
Explanation:
Brachioradialis does NOT cause flexion at the elbow. The biceps brachii, brachialis, and brachioradialis all flex the forearm. The brachioradialis muscle is responsible for quickly flexing the forearm or helping lift a load slowly.
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