Cranial-Cervical Muscles Flashcards
FRONTALIS
O: Epicranial aponeurosis
I: Skin of eyebrow & forehead
A: raise eyebrows
N: Facial Nerve (CN VII)
ORBICULARIS OCULI
O: Medial orbit—frontal & maxillary bones
I: Skin around orbit
A: Close eyelids
N: Facial Nerve (CN VII)
ORBICULARIS ORIS
O: fibers from several facial muscles
I: Skin & mucuous membrane of lips
A: Close lips
N: Facial Nerve (CN VII)
TEMPORALIS
O: Temporal Fossa (temporal, frontal, & parietal bones)
I: Coronoid process of mandible
A: Elevate, retrude mandible
MASSETER
O: Zygomatic Arch
I: Outer surface of angle & ramus of mandible
A: Elevate, protrude mandible
N: Trigeminal Nerve (CN V3)
LATERAL PTERYGOID
O: lateral pterygoid plate & greater lung of sphenoid
I: neck of mandible & articular disc
A: depress, protrude mandible
N: Trigeminal Nerve (CN V3)
MEDIAL PTERYGOID
O: lateral pterygoid plate & maxilla
I: inner surface of angle & ramus of mandible
A: elevate, retrude mandible
N: Trigeminal Nerve (CN V3)
STERNOHYOID
O: manubrium
I: hyoid bone
A: depress hyoid
N: C1-C3 ventral rami
STERNOTHYROID
O: Manubrium
I: thyroid cartilage
A: depress hyoid & larynx
N: C2-C3 ventral rami
THYROHYOID
O: thyroid cartilage
I: hyoid bone
A: depress hyoid & elevate larynx
N: C1 ventral rami
OMOHYOID
O: superior border of scapula
I: hyoid bone
A: depress & retract hyoid
N: C1-C3 ventral rami
TEMPORALIS
O: temporal fossa (temporal, frontal, & parietal bones)
I: coronoid process of mandible
A: elevate, retrude mandible
N: Trigeminal Nerve (CN V3)
BUCCINATOR
O: Posterior maxilla & mandible
I: Fibers blend w/ orbicularis oris
A: compress cheek
N: Facial Nerve (CN VII)
ZYGOMATICUS
O: zygomatic arch
I: angle of mouth
A: smile = pull angle of lips superiorly
N: Facial Nerve (CN VII)
PLATYSMA
O: Superior fascia of deltoid & pectoral regions
I: inferior border of mandible
A: flex, tighten skin of neck
N: Facial Nerve (CN VII)
