Muscles and TMJ Flashcards
Attachment of temporomandibular ligament
Zygomatic arch
Neck of condyle
Attachment of stylomandibular ligament
Styloid process
Posterior angle of mandible
Attachment of sphenomandibular ligament
Angular (sphenoid) spine
Lingula
Attachment of Masseter
O: Zygomatic arch
I: Lateral angle of mandible
Action of masseter
elevates mandible
Attachment of temporalis
O: Temporal fossa
I: temporal crest
Action of temporalis
Ant. fibers: elevate mandible
Post. fibers: retrude mandible
Attachment of medial pterygoid
O: temporal fossa
I: Medial angle of mandible
Action of medial pterygoid
Elevate mandible
Attachment of lower head of lateral pterygoid
O: Lat pterygoid plate
I: Pterygoid fovea (ant. neck of condyle)
Attachment of upper head of lateral pterygoid
O: Greater wing of sphenoid
I: neck of condyle and capsular lig/disc
Action of lateral pterygoid
Bilaterally: Depress mandible and protude
Unilaterally: Lateral excursion
Action of infra- and suprahyoid muscles together
retrude and depress mandible
