Neck and Larynx Muscles Flashcards
What does the Trapezius Muscle do?
What innervates it?
Extends neck bilaterally, laterally flexes neck and rotates face away
Spinal Accessory Nerve
What does the Sternocleidomastoid Muscle do?
What innervates it?
Extends and flexes neck, laterally flexes neck and rotates face away
Spinal Accessory Nerve
What does the Levator Scapulae Muscle do?
What innervates it?
Extends and laterally flexes neck
Dorsal Scapular Nerve
What does the Splenius Capitus Muscle do?
What innervates it?
Extends neck bilaterally, laterally flexes neck and rotates face toward
Posterior Rami C3-C5
What does the Anterior Scalene Muscle do?
What innervates it?
Flexes neck and elevates first rib
Anterior Rami C4-C6
What does the Middle Scalene Muscle do?
What innervates it?
Flexes neck and elevates first rib
Anterior Rami C3-C8
What does the Posterior Scalene Muscle do?
What innervates it?
Laterally flexes neck and elevates second rib
Anterior Rami C6-C8
What does the Mylohyoid Muscle do?
What innervates it?
Elevates hyoid bone and floor fo mouth + tongue
Nerve to Mylohyoid
What does the Geniohyoid Muscle do?
What innervates it?
Elevates hyoid bone, shortens floor of mouth, widens pharynx
C1 via hypoglossal nerve
What does the Digastric Muscle do?
What innervates it?
Elevates and steadies hyoid bone, depresses mandible
Anterior Belly: Nerve to Mylohyoid
Posterior Belly: Facial Nerve
What does the Stylohyoid Muscle do?
What innervates it?
Elevates and retracts hyoid bone, elongates floor of mouth
Facial Nerve
What does the Sternohyoid Muscle do?
What innervates it?
Depresses Hyoid Bone Ansa Cervicalis (C1-C3)
What does the Sternothyroid Muscle do?
What innervates it?
Depresses thyroid cartilage Ansa Cervicalis (C2-C3)
What does the Thyrohyoid Muscle do?
What innervates it?
Depresses Hyoid Bone and elevates thyroid cartilage
C1 via hypoglossal nerve
What does the Omohyoid Muscle do?
What innervates it?
Depresses and retracts hyoid bone Ansa Cervicalis (C1-C3)
What does the Platysma Muscle do?
What innervates it?
Draw corner of mouth inferiorly and draws skin of neck superiorly
Cervical Branch of Facial Nerve
What does the Superior Pharyngeal Constrictor Muscle do?
What innervates it?
Constricts pharyngeal wall
Pharyngeal Branch of Vagus Nerve
What does the Middle Pharyngeal Constrictor Muscle do?
What innervates it?
Constricts pharyngeal wall
Pharyngeal Branch of Vagus Nerve + Branches of Recurrent Laryngeal Nerve
What does the Inferior Pharyngeal Constrictor Muscle do?
What innervates it?
Constricts pharyngeal wall
Pharyngeal Branch of Vagus Nerve + Branches of Recurrent Laryngeal Nerve
What does the Palatopharyngeus Muscle do?
What innervates it?
Elevates pharynx and larynx
Pharyngeal Branch of Vagus Nerve
What does the Salpingopharyngeus Muscle do?
What innervates it?
Elevates pharynx and larynx
Pharyngeal Branch of Vagus Nerve
What does the Stylopharyngeus Muscle do?
What innervates it?
Elevates pharynx and larynx
Glossopharyngeal Nerve
What does the Cricothyroid Muscle do?
What innervates it?
Stretches and tenses vocal ligament (high notes)
External Laryngeal Nerve (External Branch of Superior Laryngeal Nerve)
What does the Posterior Cricoarytenoid Muscle do?
What innervates it?
Abducts vocal fold
Recurrent Laryngeal Nerve
