Due to its origin on the scapula, the long head crosses the shoulder joint, granting it a secondary action that is crucial for upper body integrity. Functional Implications in Sport and Daily Life.
Triceps Brachii Sport Performance Key Actions: Shoulder Extension and Elbow Extension
As the triceps contracts, it pulls the olecranon posteriorly, causing the forearm to move toward the posterior aspect of the arm. Shoulder Extension and Adduction Beyond stabilizing the shoulder, the long head facilitates specific movements of the arm itself.
Because of the muscle's line of pull directly behind the elbow joint, it is exceptionally efficient at producing this straightening motion without requiring excessive force from surrounding muscles. The Critical Role of the Long Head While all three heads contribute to elbow extension, the long head of the triceps brachii has a unique and vital function that distinguishes it from its counterparts.
Triceps Brachii Sport Performance Key Actions in Athletic Movements
Its long head also plays a critical role in the stabilization of the shoulder joint and the controlled descent of the arm, making it indispensable for both powerful movements and fine motor control. This action is evident during the downward phase of a pull-up or when recovering a swing in sports like tennis or baseball.
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