Anatomy Flashcards
Tilts and rotates head and neck
Sternocleidomastoid
Lifts and rotates the shoulders
Trapezius
Closing or pursing lips
Orbicularis oris
Flattens cheek/assists in chewing; assists the muscles of mastication
Buccinator
Smiling widely
Risorius
Smiling and raising upper lip
Zygomaticus
Smiling
Levator anguli oris
Frowning
Depressor anguli oris
All facial muscles are innervated by
Seventh cranial nerve (VII) Facial nerve
Blood supply for facial muscles
facial artery
What are the muscles of mastication
Masseter
Temporalis
Lateral pterygoid
Medial pterygoid
Can become enlarged in patients who clench or grind
Masseter
Elevation of the mandible during jaw closing
Masseter and medial pterygoid
Elevation of the mandible and retraction of mandible
Temporalis
Slight depression of mandible, lateral deviation of mandible, and protrusion of mandible
Lateral pterygoid
All muscles of mastication are innervated by the
mandibular division of the fifth cranial or trigeminal nerve
Blood supply for muscles of mastication
maxillary artery (branch of the carotid)
Mylohyoid
Makes up the floor of the mouth
What does the suprahyoid group do
Depression of the mandible
Action: swallowing
What are the parts of the suprahyoid group
Digastric
Mylohyoid
Geniohyoid
Sylohyoid
What are the parts of the infrahyoid group
Sternothyroid
Omohyoid
Thyrohyoid
What does the infrahyoid group do
Stabilize hyoid bone
Action: swallowing and speech
What are the muscles of the pharynx involved in
speaking, swallowing, and middle ear function
Tissue that extends from the junction of the hard and soft palates down to the mandible (distal to last tooth) and stretches upon opening, referred to as raphe
Pterygomandibular fold
Lingual frenum
Whartons duct or submandibular ducts at base
Duct openings from submandibular and sublingual salivary glands
sublingual caruncle
These muscles shape the tongue
intrinsic muscles
Innervation of the intrinsic muscles of the tongue
Twelfth cranial nerve or hypoglossal (XII)
Blood supply for the intrinsic muscles of the tongue
lingual artery
What are the extrinsic muscles of the tongue
Genioglossus
Styloglossus
Hyoglossus
Protrudes the tongue
genioglossus
retracts the tongue
styloglossus
depresses the tongue
hyoglossus
10 to 14, contain taste buds and associated with Von Ebner’s glands
Circumvallate papillae
Fewer, contain taste buds, red, muschroom shaped
Fungiform papillae
The most numerous of papillae but do not contain taste buds, keratinized tissue give the tongue a velvety texture; associated with geographic and hairy tongue
Filliform papillae
Separation of 1/3 posterior and the 2/3 anterior portion of the tongue
Sulcus terminalis
Divides the TMJ into two compartments called synovial cavities (where synovial fluid is produced)
Articular disk
What are the two basic types of movements of the TMJ
Gliding and rotational
Limited ability to open the mouth (hypomobility), due to contraction of the muscles of mastication (lockjaw)
Trismus
Dislocation of both joints caused by opening the mouth too wide
Subluxation
TMJ problems affect what muscles
lateral pterygoid
Disk displacement
most common problem with TMJ