Which muscle extends and adducts the shoulder with its long head?

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Prepare for the NHI Eastern Kinesiology Test with our comprehensive quiz. Utilize flashcards and multiple-choice questions, complete with hints and detailed explanations. Ready yourself for success!

Multiple Choice

Which muscle extends and adducts the shoulder with its long head?

Explanation:
The long head of the triceps brachii crosses the shoulder joint, so when it contracts it helps extend the arm at the shoulder and can contribute to adduction as well. This combination of actions is characteristic of the triceps long head. The other muscles either don’t extend the shoulder in the same way, don’t cross the shoulder with a long head, or are primarily involved in other actions (like abduction or internal rotation). So the muscle described is the triceps brachii.

The long head of the triceps brachii crosses the shoulder joint, so when it contracts it helps extend the arm at the shoulder and can contribute to adduction as well. This combination of actions is characteristic of the triceps long head. The other muscles either don’t extend the shoulder in the same way, don’t cross the shoulder with a long head, or are primarily involved in other actions (like abduction or internal rotation). So the muscle described is the triceps brachii.

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