Human Anatomy: Muscle Groups

Human Anatomy

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Muscle Function & Other Pertinent Medical Information
ORIGIN: Lower posterior surface of angle between laminae of thyroid cartilage
INSERTION: Vocal process of arytenoid cartilage
ACTION: Shortens and relaxes vocal cords by medial rotation and protraction of arytenoid cartilage
NERVE: Recurrent laryngeal branch of vagus nerve (X)

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