Name the main elbow flexors.

• A. Biceps brachii, brachialis, brachioradialis
• B. Triceps brachii, anconeus, pronator teres
• C. Brachioradialis, brachialis
• D. Biceps brachii, brachialis, pronator teres

Answer: (A)

The main elbow flexors are the muscles that bend the elbow, located on the front of the arm. The trio of biceps brachii, brachialis, and brachioradialis forms this primary group. Biceps brachii crosses both the shoulder and elbow and powers elbow flexion most strongly when the forearm is supinated, while also aiding in forearm supination. Brachialis sits deeper, attaches to the ulna, and provides reliable elbow flexion regardless of forearm position, making it a constant elbow flexor. Brachioradialis originates on the humerus and inserts on the radius; it contributes notably to elbow flexion, especially when the forearm is in a neutral position.

The other options mix in movements that are not primary elbow flexors—triceps brachii and anconeus extend the elbow, and pronator teres mainly pronates the forearm (though it can assist briefly with flexion). Leaving out biceps brachii or including pronator teres would underrepresent the true group of main elbow flexors.