What is the function of the brachiocephalicus?

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Multiple Choice

What is the function of the brachiocephalicus?

Explanation:
The brachiocephalicus mainly protracts the forelimb by pulling the humerus forward at the shoulder joint. Its fibers run from the head/neck to the arm, so when it contracts on both sides, the limb is drawn forward, helping to advance the body for stepping. It isn’t primarily responsible for retracting the limb, lifting the shoulder, or extending the elbow—the latter actions involve other muscles such as those that retract the limb, elevate the shoulder girdle, or extend the elbow.

The brachiocephalicus mainly protracts the forelimb by pulling the humerus forward at the shoulder joint. Its fibers run from the head/neck to the arm, so when it contracts on both sides, the limb is drawn forward, helping to advance the body for stepping. It isn’t primarily responsible for retracting the limb, lifting the shoulder, or extending the elbow—the latter actions involve other muscles such as those that retract the limb, elevate the shoulder girdle, or extend the elbow.

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