Muscles of the Head & Neck

tilts and rotates head and neck

sternocleidomastoid

lifts and rotates the shoulders

trapezius

closing or pursing lips

orbicularis oris

flattens cheek/assists in chewing and muscles of mastication

buccinator

smiling widely

risorius

smiling and raising upper lip

zygomaticus

smiling

levator anguli oris

frowning

depressor anguli oris

facial muscles have origins with _________ and insertions in _________

bone, skin

can become enlarged in patients who habitually clench or grind

masseter

elevation of mandible

masseter and medial pterygoid

elevation and retraction of mandible

temporalis

most likely affected by direct trauma to the TMJ

lateral pterygoid

slight depression of mandible, lateral deviation of mandible, and protrusion of mandible

lateral pterygoid

what nerve innervates the muscles of mastication

V3

what artery supplies blood to the muscles of mastication

maxillary artery

what nerve innervates the facial muscles

CN VII

what are the muscles of mastication

masseter, temporalis, medial and lateral pterygoid

what are the suprahyoid muscles

digastric, mylohyoid, geniohyoid, and stylohyoid

what are the infrahyoid muscles

sternothyroid, sternohyoid, omohyoid, and thyrohyoid

what are the hyoid muscles used for

swallowing

what are the intrinsic muscles of the tongue

superior longitudinal, transverse, vertical, and inferior longitudinal

what are the extrinsic muscles of the tongue

genioglossus, styloglossus, and hyoglossus

what muscle protrudes the tongue

genioglossus