Neck and Larynx Muscles Flashcards
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 Longus Capitus Muscle do?
What innervates it?
Flexes neck Anterior Rami (C1-C3)
What does the Rectus Capitus Lateralis Muscle do?
What innervates it?
Laterally flexes Atlantooccipital joint Anterior Rami (C1-C2)
What does the Stylopharyngeus Muscle do?
What innervates it?
Elevates pharynx and larynx
Glossopharyngeal Nerve
What does the Omohyoid Muscle do?
What innervates it?
Depresses and retracts hyoid bone Ansa Cervicalis (C1-C3)
What does the Vocalis Muscle do?
What innervates it?
Relaxes posterior part of vocal ligament and tenses anterior part of vocal ligament
Recurrent Laryngeal Nerve
What does the Sternothyroid Muscle do?
What innervates it?
Depresses thyroid cartilage Ansa Cervicalis (C2-C3)
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 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 Thyroarytenoid Muscle do?
What innervates it?
Relaxes vocal fold
Recurrent Laryngeal Nerve
What does the Longus Colli Muscle do?
What innervates it?
Flexes neck and rotates face away Anterior Rami (C2-C6)
What does the Anterior Scalene Muscle do?
What innervates it?
Flexes neck and elevates first rib
Anterior Rami C4-C6
What does the Posterior Scalene Muscle do?
What innervates it?
Laterally flexes neck and elevates second rib
Anterior Rami C6-C8
What does the Stylohyoid Muscle do?
What innervates it?
Elevates and retracts hyoid bone, elongates floor of mouth
Facial Nerve