2Nd Order - Face/neck

Front 1

Masseter M:
A N I O

Back 1

A*: chewing (elevation), side to side swing (lat. & med. excursion)
N: mandibular N
I: lat. surface of mandibular ramus
O: zygomatic arch

Front 2

Temporalis M:
A N I O

Back 2

A: chewing (elevation of mandible)
N: mandibular N
I: coronoid process & ant. border of mandibular ramus
O: temporal fossa

Front 3

Lateral Pterygoid M:
A N I O

Back 3

A: chewing (depression), side to side swing (lat. & med. excursion of mandible)
N: mandibular N
I: neck of mandible, TMJ
O: lat. pterygoid plate, greater wing of sphenoid

Front 4

Medial Pterygoid M:
A N I O

Back 4

A: chewing (elevation), side to side swing (lat. & med. excursion of mandible)
N: mandibular N
I: med. surface of mandibular ramus
O: lat. pterygoid plate, palatine bone, lat. surface of maxilla

Front 5

Frontalis M:
- A
- facial expressions

Back 5

A: elevate eyebrows, draws scalp forward (wrinkle forehead skin)
- surprise, fright,

Front 6

Occipitalis M:
- A

Back 6

A: retract scalp

Front 7

- What connects the occipitalis & frontalis MM?
- it serves as the insertion/origin for which?

Back 7

- Galea aponeurosis
- O for frontalis M; I for occipitalis M

Front 8

Orbicularis oculi M:
- A
- facial expressions/actions

Back 8

A: sphincter of eyelids, aids in flow of tears across eye
- closes eye in blinking, squinting, & sleep

Front 9

Corrugator Supercilii M:
- A
- facial expressions

Back 9

A: draws eyebrows medially & downward, reduces glare of bright sunlight
- frowning, concentration

Front 10

Nasalis M:
- A

Back 10

A: widens nostrils, narrows int. air passage between vestibule & nasal cavity