Brachialis
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The only pure flexor of the elbow joint; pulls on the ulna, which does not rotate.
Detail
The brachialis pulls on the ulna, which does not rotate, thus making it the only pure flexor of the joint (Ellison, 1991). Its function is flexion. A neutral-position hammer curl brings the brachialis and brachioradialis into play. It contracts (with the biceps brachii and brachioradialis) during elbow flexion, with the triceps reciprocally innervated to relax.
Key facts
- The only pure flexor of the elbow joint (pulls on the ulna, which doesn't rotate).
- Function: flexion.
- Brought into play by the neutral-grip hammer curl.
Connections
- Biceps Brachii — strongest elbow flexor alongside it.
- Brachioradialis — also engaged in the hammer curl.
- Flexion — its sole action.
- Hammer Curls — training exercise.
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Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.