Muscles of fascial expression

Question 1

Obicularis Oris - palpebral fibre

Answer 1

Origin: Contained within upper and lower eyelid
Insertion: upper and lower eyelid
Innervation: Cranial Nerve 7 (fascial nerve)
Function: Softly closes eye

Question 2

Obicularis Oris - Orbital fibre

Answer 2

Origin: Encircle the orbit
Insertion: Encircle the orbit
Innervation: Cranial Nerve 7 (fascial nerve)
Function: Squeezes opening of eye (squint)

Question 3

Obicularis Oris - Lamicral fibres

Answer 3

Origin: vertical fibres on middle corner of the eye
Insertion: vertical fibres on middle corner of the eye
Innervation: Cranial Nerve 7 (fascial nerve)
Function: Opens nasolacrimal duct to bring tears from inner corner of eye to nasal cavity

Question 4

Corrugator Supercilli

Answer 4

Origin: Superificilary arch
Insertion: on the skin of the medial end of the eyebrow
Innervation: Cranial Nerve 7 (fascial nerve)
Function: wrinkles on medial side of eyebrow (frowning)

Question 5

Levator Labi Suprioris Alaque Nasi

Answer 5

Origin: frontal process of maxiilla
Insertion: medial fibres insert into lateral aspect of nostril. Lateral fibres insert into upper lip
Innervation: Cranial Nerve 7 (fascial nerve)
Function: lift of nostril and upper lip

Question 6

Procerus

Answer 6

Origin: Nasal bone
Insertion: skin of medial half of forehead
Innervation: Cranial Nerve 7 (fascial nerve)
Function: horizontal wrinkles between nasal bridge (between eyebrows)

Question 7

nasalis

Answer 7

Origin: maxilla
Insertion: nasal bones
Innervation: Cranial Nerve 7 (fascial nerve)
Function: compresses nose and nostril, elevates corner of nostril to flare nostrils

Question 8

orbocularis oris

Answer 8

Origin: maxilla
Insertion: forms a complete muscular ring around opening of mouth
Innervation: Cranial Nerve 7 (fascial nerve)
Function: opens mouth and purses lips

Question 9

zygomatic major and minor

Answer 9

Origin: zygomatic bone
Insertion: upper lip and corner of mouth
Innervation: Cranial Nerve 7 (fascial nerve)
Function: aids in smiling

Question 10

Risorius

Answer 10

Origin: deep fascia of face
Insertion: runs horizontally to corner of mouth (blends with obicularis oris)
Innervation: Cranial Nerve 7 (fascial nerve)
Function: widens mouth (smiling)

Question 11

Mentalis

Answer 11

Origin: body of mandible
Insertion: lower lip
Innervation: Cranial Nerve 7 (fascial nerve)
Function: wrinkles in chin area (pouting)

Question 12

Levator labii superioris

Answer 12

Origin: zygomatic process of maxilla, infraoribital margin
Insertion: upper lip
Innervation: Cranial Nerve 7 (fascial nerve)
Function: elevates lip (smiling)

Question 13

Depresor labii inferioris

Answer 13

Origin: Mandible
Insertion: skin of lower lip
Innervation: Cranial Nerve 7 (fascial nerve)
Function: lowers the lip

Question 14

Levator anguli oris

Answer 14

Origin: Maxilla
Insertion: corner of mouth
Innervation: Cranial Nerve 7 (fascial nerve)
Function: elevates ankle of lip (smiling)

Question 15

Depresor anguli oris

Answer 15

Origin: Maxilla
Insertion: corner of mouth
Innervation: Cranial Nerve 7 (fascial nerve)
Function: lowers angle of mouth

Question 16

Buccinator

Answer 16

Origin: Mandible and maxilla
Insertion: run horizontally into corner of mouth to blend with obicularis oris
Innervation: Cranial Nerve 7 (fascial nerve)
Function: Pushes food from cheeck to teeth and used to whistle

Question 17

Platysama

Answer 17

Origin: fascia of upper thoracic region
Insertion: fascia of face, lower portion of mandible
Innervation: Cranial Nerve 7 (fascial nerve)
Function: aid in opening the jaw & increase tension of the skin of the neck

Question 18

Occipitofrontalis

Answer 18

Origin: Frontalis - skin of forehad. Occipitalis. - superior nuchal line and mastoid process
Insertion: Galea Aponeurotica
Innervation: Cranial Nerve 7 (fascial nerve)
Function: move scalp (just frontalis creates horizontal wrinkles of forehead)