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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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colleen colleen
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12 years ago
While unloading the trunk of her car, Amy pulls a muscle. As a result, she has difficulty moving her arm. The attending physician in the emergency room tells her that she injured her latissimus dorsi muscle. Knowing that the latissimus dorsi was a back muscle, Amy doesn't understand what the muscle has to do with her injured arm. Explain the involvement of the muscle in Amy's injury.
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Sunshine ☀ ☼

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12 years ago
Although the latissimus dorsi muscle is located across the back, it inserts on the humerus, the large bone of the upper arm. When the muscle contracts, it contributes to extension, adduction, and medial rotation of the humerus. All of these arm movements would be partially impaired if the muscle were damaged.
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