Which skeletal muscle is innervated by the phrenic nerve?

Name: Which skeletal muscle is innervated by the phrenic nerve?
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Question

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The diaphragm is the only muscle listed that is innervated by the phrenic nerve, which is a major nerve involved in breathing. The rectus abdominus is innervated by various nerves in the lumbar and thoracic regions, the external intercostals are innervated by intercostal nerves, and the sternocleidomastoid is innervated by the spinal accessory nerve.

Which Skeletal Muscle Is Innervated by the Phrenic Nerve