Facial Expression And Mastication Flashcards
What does the scalp attach anteriorly
Supraorbital margin
Where does the scalp attach posterior
Superior nuchal line
Where does the scalp attach laterally
Temporal fascia to zygomatic arch
Different layers of the scalp
Skin Connective tissue (dense) Aponeurosis (Galea Aponeurotica) Loose connective tissue Pericranium
What links frontal is and occipitals muscles
Aponeurosis (Galea Aponeurotica)
What layer is where the emissary vein drains to cranial sinus, and cause danger to spread infection
Loose connective tissue of the scalp
Face boundaries
Below supraorbital margin to the chin, ear to ear
Facial expression
Both scalp and face
Ligaments in the temporomandibular joint
Joint capsule
Lateral temporomandibular ligament
Sphenomandibular ligament
Stylomandibular ligament
Superior compartment of fibrocartilage disc in the temporomandibular joint
mandibular fossa superiorly and disc inferiorly – translational movement
Inferior compartment of fibrocartilage disc in the temporomandibular joint
disc superiorly and mandibular condyle inferiorly – rotational movement
What motions do TMJ do
Depression, elevation, protrusion, retrusion, retraction, side to side excursion
Protrusion of tmj motion
Lateral pterygoid assisted by medial pterygoid
Retraction of tmj motion
Posterior fibers of temporal is deep part of masseter and geniohyoid and digastric
Elevation of tmj motion
Temporalis, masseter, medial pterygoid
Depression of tmj motion
Gravity
Digastric, geniohyoid and mylohyoid muscles
What causes Tmj popping and/clicking
Hypermobile joint capsule, or tight lateral pterygoid muscle or damaged disc place the disc anteriorly against the articular tubercle, mandibular condyle reduces to the disc will cause clicking or popping noise
Temporal fossa boundary
Posteriorly and superiorly by the temporal lines
Anteriorly by the frontal and zygomatic bones
Laterally by the zygomatic arch
Inferiorly by the infratemporal crest
Floor: pterion (temporal/parietal/frontal/sphenoid)
Roof: temporalis fascia
Contents of temporal fossa
Upper portion of temporalis
What’s the infratemporal fossa
Continuous to temporal fossa
Boundary of infratemporal fossa
Deep to the zygomatic arch and ramus of the mandible, posterior to the maxilla and bordered by the lateral pterygoid plate
Contents of the infratemporal fossa
Lower portion of the temporalis muscle lateral and medial pterygoid muscles Maxillary artery Pterygoid venous plexus Mandibular, inferior alveolar, lingual, buccal, and chorda tympani nerves Otic ganglion
Pterygopalatine fossa
Boundary
Roof: greater wing of sphenoid
Medially: perpendicular plate of palatine
Anteriorly: the posterior aspect of the maxilla
Posteriorly: the pterygoid process
Floor: pyramidal process of palatine
Pterygopalatine fossa Contents
Pterygopalatine ganglion
Pterygopalatine part of maxillary artery
