Face And Parotid Region

Question 1

Platysma

Answer 1

N: Cervical and mandibular branch of facial n

Question 2

Buccinator

Answer 2

N: buccal branch of facial nerve

A: Necessary for firmness on the lateral side of the oral cavity

Question 3

Nasalis

Answer 3

N: zygomatic branch of facial n.;

O: maxilla

I: near alar cartilage of nose

Contains a compressor part and a dilator part

Question 4

Obicularis Oris

Answer 4

Sphincter muscle that surrounds the mouth

N: buccal and mandibular branches of facial n.

Question 5

Orbicularis Oculi

Answer 5

N: zygomatic and temporal branches of facial n.

Orbital part = sphincter
Palbebral Part = eyelid
Lacrimal Part = med. extension of eyelid over lacrimal puncta; bathes eyes with tears

Question 6

Frontalis

Answer 6

N: temporal branch of facial n.

Question 7

Other Muscles Effecting Movement Around the mouth

Answer 7

Zygomaticus Major= smile muscle
Zygomaticus Minor = sneer muscle along with levators
Mentalis = dimple in the middle of the chin
Risorius = grin muscle

Question 8

Temporalis

Answer 8

O: floor of temporal fossa and deep surface of temporal fascia

I: tip of medial surface of coronoid process and ant. Border of Ramus of mandible

A: elevates mandible closing jaw; post. Fibers retrude protruded jaw

N: deep temporal branches of mandibular n. (CN V3)

Question 9

Masseter

Answer 9

O: Inf. Border and med. surface of zygomatic arch

I: lateral surface of Ramus of mandible and its coronoid process

A: elevates and protrudes mandible, closing jaw; deep fibers retrude it

N: masseteric n. = branch of mandibular n. (CN V3)

Question 10

Lateral Pterygoid

Answer 10

O: sup head-infra temporal surface and infra temporal crest of greater wing of sphenoid; Inf head- Lat. surface of Lat. Pterygoid plate

I: neck of mandible; articular disc and TMJ capsule

A: bilateral-protrudes jaw and drops jaw; alone-produces side to side motion of mandible

N: lateral Pterygoid n. = branch of mandibular n. (CN V3)

Question 11

Medial Pterygoid

Answer 11

O: deep=med. surface of lateral Pterygoid plate and pyramidal process of process of palatine bone; superficial=tuberosity of maxilla

I: med. surface of Ramus of mandible Inf. To mandibular foramen

A: helps elevate mandible closing jaw; bilateral-helps protrude mandible; unilateral-produces grinding

N: medial Pterygoid n. - branch of mandibular n. (CN V3)