The action of the splenius cervicis includes which movement?

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Multiple Choice

The action of the splenius cervicis includes which movement?

Explanation:
Splenius cervicis works in two ways: when both sides contract, it extends the neck; when it contracts on one side, it rotates the head to the same side. So extending the neck and rotating the head toward the same side is exactly what this muscle does, matching the described action. The other ideas aren’t functions of this muscle—rib elevation is the job of inspiratory muscles, and pelvis stabilization isn’t related to the splenius cervicis, while flexing the neck is more characteristic of other muscles that oppose its primary action.

Splenius cervicis works in two ways: when both sides contract, it extends the neck; when it contracts on one side, it rotates the head to the same side. So extending the neck and rotating the head toward the same side is exactly what this muscle does, matching the described action. The other ideas aren’t functions of this muscle—rib elevation is the job of inspiratory muscles, and pelvis stabilization isn’t related to the splenius cervicis, while flexing the neck is more characteristic of other muscles that oppose its primary action.

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