Unit 4 Muscles Table Flashcards
What is the action of the Frontalis muscle?
Draw scalp anteriorly, raise eyebrows, wrinkle forehead
What is the innervation of the Frontalis muscle?
Facial nerve (CN VII)
What is the action of the Occipitalis muscle?
Draw scalp posteriorly
What is the innervation of the Occipitalis muscle?
Facial nerve (CN VII)
What is the action Orbicularis oculi muscle?
Close the eye
What is the innervation of the Orbicularis oculi muscle?
Facial nerve (CN VII)
What is the action of the Orbicularis oris muscle?
Close lips, protrude lips
What is the innervation of the Orbicularis oris muscle?
Facial nerve (CN VII)
What is the action of the Buccinator muscle?
Press teeth against cheek
What is the innervation of the Buccinator muscle?
Facial nerve (CN VII)
What is the action of the Platysma muscle?
Tense skin of neck, draw part of lower lip inferiorly and posteriorly
What is the innervation of the Platysma muscle?
Facial nerve (CN VII)
What is the origin of the Masseter muscle?
Zygomatic arch
What is the insertion of the Masseter muscle?
Ramus of mandible and coronoid process
What is the action of the Masseter muscle?
Elevate mandible
What is the innervation of the Masseter muscle?
Mandibular division of Trigeminal nerve (CN V3)
What is the origin of the Temporalis muscle?
Floor of the temporal fossa
What is the insertion of the Temporalis muscle?
Coronoid process of the mandible
What is the action of the Temporalis muscle?
Elevate mandible, retract mandible
What is the innervation of the Temporalis muscle?
Mandibular division of Trigeminal nerve (CN V3)
What is the origin of the Medial pterygoid muscle?
Medial side of lateral pterygoid plate of sphenoid bone
What is the insertion of the Medial pterygoid muscle?
Angle of the mandible
What is the action of the Medial pterygoid muscle?
Elevate mandible, protract mandible, move mandible side-to-side
What is the innervation of the Medial pterygoid muscle?
Mandibular division of Trigeminal nerve (CN V3)