G4 Parotid, Temporal, TMJ

Question 1

Parotid gland swelling will push the ear superolateral, as seen in this illness.

Answer 1

Mumps

Question 2

The superficial temporal and maxillary vv form the _____ vein. It passes thru the Parotid gland and then splits into 2 divisions that drain into EJV and IJV.

Answer 2

Retromandibular

Question 3

The two branches of the terminal bifurcation of the External Carotid artery are _____ and _____

Answer 3

Superificial temporal a.

Maxillary a.

Question 4

3 structures that pass thru parotid gland:

Answer 4

1. Facial n.
2. Ext. Carotid a.
3. Retromandibular v.

Question 5

Contents of Temporal Fossa:

Answer 5

1. Temporal fat pad
2. Temporalis m. (Covered by thick temporal fascia)
3. Neurovasculature (CN V3)

Question 6

Branch of CN V3. Provides sensory innervation to TMJ and lateral scalp. Travels with Superficial temporal a/v; runs deep to parotid gland and post to TMJ. Carries p-symp fibers from CN IX into parotid.

Answer 6

Auriculotemporal n.

Question 7

Neurovasculature found in the Temporal Fossa:

Answer 7

1. Auriculotemporal n.
2. Ant and Post Deep Temporal nn.
3. Superificial, Middle, and Deep temporal arteries

Question 8

Borders of infratemporal fossa:

Answer 8

Lat- Ramus of mandible
Med- Lateral pterygoid plate
Ant- Maxilla
Post- Tympanic plate, mastoid and styloid processes
Roof- greater wing of sphenoid, temporal bone, Foramen ovale, Foramen spinosum

Question 9

Infratemporal Fossa Contents:

Answer 9

1. Muscles- temporalis, medial/lateral pterygoid mm
2. A/V- Maxillary; pterygoid plexus of veins
3. Nerves- CN V3, Posterior Superior Alveolar n. (V2), Chorda tympani n. (CN VII), otic ganglion, lesser petrosal n.

Question 10

CN V3 divides into Anterior and Posterior divisions, describe them:

Answer 10

Ant- small, mainly motor (1 sensory branch- Buccal n.)

Post- larger, mainly sensory (1 motor branch- Mylohyoid n.)

Question 11

CN V3 Branches-

Answer 11

1. Auriculotemporal N. (sensory)
2. Masseteric and Deep temporal (Ant/Post) nn. (Motor)
3. Med/Lat Pterygoid nn. (Motor)
4. Buccal n. (Sensory)
5. Inferior Alveolar and Lingual nn. (Sensory)
6. Meningeal branches (sensory)

Question 12

Nerves of Mastication:

Answer 12

1. Masseteric n. -supplies masseter m. (Thru mand notch)
2. Deep Temporal nn.- supply temporalis m. (Passes deep to it)
3. Med/Lat Pterygoid nn.

Question 13

Special sensory branch of CN VII. Joins lingual n posteriorly. Supplies p-symp innervation to lower 2 salivary glands and taste fibers from anterior 2/3 tongue.

Answer 13

Chorda Tympani n. (CN VII)

Question 14

TMJ:
______ _____ articular capsule surrounding joint.

Movements: _____ and _____

Answer 14

Relatively lax

Hinge
Gliding

Question 15

Protrusion at TMJ is caused by:

Answer 15

Lateral Pterygoid assisted by medial pterygoid

Question 16

Retraction at TMJ is caused by

Answer 16

Temporalis (posterior fibers)
Masseter (deep)
Geniohyoid
Digastric

Question 17

Elevation at TMJ is caused by

Answer 17

Temporalis
Masseter
Medial Pterygoid

Question 18

Depression at TMJ is caused by

Answer 18

Gravity
Digastric m.
Geniohyoid m.
Mylohyoid m.

Question 19

Articular Disc Specifics:

1. Superior Surface-
2. Inferior surface-
3. Thickness-

Answer 19

1. Concavoconvex- to fit articular tubercle and mandibular fossa
2. Concave- to fit around Mandibular condyle
3. Thicker toward periphery (where it attaches to articular capsule)

Question 20

Accessory Ligaments of TMJ:

Answer 20

1. Stylomandibular Ligament (styloid process -> ramus) (separates parotid and submandibular glands)
2. Sphenomandibular ligament (sphenoid -> lingula)