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6 Cards in this Set

  • Front
  • Back
MEDIAL PTERYGOID: OIAI
D. Medial pterygoid

1. Origin: superficial head;maxillary tuber; deep head;medial surface of
the lateral pterygoid plate (the two heads embrace the anterior portion
ofthe inferior head ofthe lateral pterygoid)

2. Insertion: internal surface ofthe ramus and angle ofthe mandible

3. Action: elevation ofthe mandible

4. Innervation: nerve to the medial pterygoid, a branch of tlie mandibular
nerve
II. Temporomandibular Joint

BONY COMPONENTS
II. Temporomandibular Joint

A. Bony components include the condyle ofthe mandible and tlie inandibular
fossa and articular tubercle ofthe temporal bone; a fibrous capsule attaches
near the margins ofthe articular surfaces
II. Temporomandibular Joint

Lateral temporomandibular ligament
B. Ligaments

1. Lateral temporomandibular ligament: reinforces the lateral aspect ofthe
fibrous capsule between the articular tubercle and neck of tlie mandible
II. Temporomandibular Joint

Sphenomandibular ligament
Sphenomandibular ligament: fibrous band extending from tlie sphenoid
spine to the lingula ofthe mandible; it stands clear ofthe temporoman-
dibular joint
II. Temporomandibular Joint

ARTICULAR DISC
C. An articular disc attaches to the circumference of the fibrous capsule and
divides the joint into an upper and a lower synovial cavity; protraction and
retraction of the mandible occur in the upper synovial joint and depression
and elevation occur in the lower synovial joint
MANDIBULAR NERVE

EMERGES FROM...
III. Nerves

A. Mandibular nerve

1. Emerges from foramen ovale deep to the lateral pterygoid and immedi-
ately breaks up into the sensory and motor branches noted below (it is
the only division ofthe trigeminal nerve with motor branches)