Action: Which muscle extends the cervical spine and assists in lateral flexion?

Master the Back Muscles: Origins, Insertions, Actions and Innervations with a comprehensive quiz. Engage with diverse question formats, including multiple choice and flashcards, each supplemented with hints and explanations. Ensure your readiness for academic and professional success!

Multiple Choice

Action: Which muscle extends the cervical spine and assists in lateral flexion?

Explanation:
Extending the cervical spine is accomplished by the posterior neck muscles that pull the head and neck backward. When they contract on one side, they also assist with lateral flexion, so they tilt the neck toward that same side. The description “extends the cervical spine and assists in lateral flexion” matches these extensor muscles in the neck (such as the splenius group and parts of the neck erector spinae), which bilaterally extend the neck and can unilaterally lateral flex. The other options describe actions that don’t fit this combination: flexing the neck, extending a different region (the lumbar spine), or rotating the head without extension.

Extending the cervical spine is accomplished by the posterior neck muscles that pull the head and neck backward. When they contract on one side, they also assist with lateral flexion, so they tilt the neck toward that same side. The description “extends the cervical spine and assists in lateral flexion” matches these extensor muscles in the neck (such as the splenius group and parts of the neck erector spinae), which bilaterally extend the neck and can unilaterally lateral flex. The other options describe actions that don’t fit this combination: flexing the neck, extending a different region (the lumbar spine), or rotating the head without extension.

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