Muscles (Action and Innervation) Flashcards
Platysma
A - facial twitch, expression
I - Facial nerve VII
Orbicularis Oris
A - Move lips
I - Facial nerve VII
Buccinator
A - Return food from vestibular region to teeth
I - Facial Nerve VII
Levator Nasolabialis
A - Dilates nostril, raises superior lip
I - Facial nerve VII
Orbicularis Oculi
A - Close palpebral fissure (blink)
I - Facial Nerve VII
Cricothyroid
A - Tenses focal fold by drawing together ventral parts of cricoid and thyroid cartilages
I - Cranial Laryngeal Nerve
Dorsal Cricoarytenoid
A - open the glottis
I - caudal laryngeal nerve
Lateral Cricoarytenoid
A - close the glottis
I - caudal laryngeal nerve
Thyroarytenoid
A - relax the vocal fold, constrict the glottis
I - caudal laryngeal nerve
Vocalis
A - Shortens and relaxes vocal cords
I - Caudal laryngeal nerve
Temporalis
A - close the jaws
I - Mandibular branch of the Trigeminal nerve V3
Masseter
A - Close the jaws
I - Mandibular branch of Trigeminal nerve V3
Pterygoid
A - Close the jaws
I - Mandibular branch of Trigeminal nerve V3
Digastricus
A - Open the jaws
I - Mandibular branch of Trigeminal nerve V3
Styloglossus
A - Retracts and elevates tongue
I - Hypoglossal nerve XII
Hyoglossus
A - Retracts and depresses tongue
I - Hypoglossal nerve XII
Genioglossus
A - Protrude tongue, retract apex
I - Hypoglossal nerve XII
Sternohyoid
A - Swallowing
I - Hypoglossal nerve XII
Thyrohyoid
A - Swallowing
I - Hypoglossal nerve XII
Mylohyoid
A - Aids in support of tongue
I - Mandibular branch of Trigeminal nerve V3
Geniohyoid
A - Draw hyoid and larynx rostrally
I - Hypoglossal nerve XII
Cricopharyngeus
A - Swallowing
I - Glossopharyngeal nerve IX
Thyropharyngeus
A - Swallowing
I - Glossopharyngeal IX
Hyopharyngeus
A - Swallowing
I - Glossopharyngeal nerve IX
Levator Palpebrae
A - Lift superior palpebrae
I - Oculomotor nerve III
Dorsal Oblique
A - Rotate eye medially
I - Trochlear nerve IV
Ventral Oblique
A - Rotate eye laterally
I - Oculomotor nerve III
Dorsal Rectus
A - Rotate eye dorsally
I - Oculomotor nerve III
Lateral Rectus
A - Rotate eye laterally
I - Adducent nerve VI
Medial Rectus
A - Rotate eye medially
I - Oculomotor nerve III
Ventral Rectus
A - Rotate eye ventrally
I - Oculomotor nerve III
Retractor Bulbi
A - Pull eye caudally
I - Abducent nerve VI