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Flashcards in OINAs Deck (378)
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1

Platysma insertion

Over the pectoralis major and deltoid muscles

2

Platysma action

It tenses the skin of the
neck

3

Origin of the zygomaticus major

The zygomatic arch

4

Insertion of the zygomaticus major

Into the corner of the mouth.

5

Action of the zygomaticus major

It pulls the angle of the mouth superiorly and posteriorly as in laughing.

6

Origin of the zygomaticus minor

The zygomatic bone and continues with orbicularis oculi on the lateral face of the levator labii superioris

7

Insertion of the zygomaticus minor

Into the outer part of the upper lip.

8

Action of the zygomaticus minor

It draws the upper lip backward, upward and outward as in smiling

9

Origin of extraocular rectus muscles

A common tendinous ring that surrounds the optic canal and superior orbital fissure

10

Insertion of extraocular rectus muscles

The anterior portion of the sclera.

11

Innervation of extraocular rectus muscles

(a) Superior
(b) Inferior
(c) Medial
(i) I –CN III
(d) Lateral
(i) I – CN VI

12

Origin of superior oblique

The sphenoid bone passes through the trochlea (cartilaginous sling)

13

Insertion of superior oblique

The posterior lateral aspect of the sclera

14

Innervation of superior oblique

CN IV

15

Origin of inferior oblique

The anteromedial aspect of the floor of the orbit

16

Insertion of inferior oblique

The posterolateral aspect of the sclera

17

Innervation of inferior oblique

CN III

18

All facial muscles are innervated by the ____

All facial muscles are innervated by the Facial nerve

19

Action of Orbicularis oris

Encircles the mouth, causes mouth closure, pursing or puckering of lips,
chewing and speaking.

20

Action of the buccinator

Located in the cheek and is important for mastication. It maintains the skin against the teeth during chewing. It aids with whistling and sucking.

21

Origin of platysma

The skin of the face and mandible and descends
into the superficial fascia of the neck

22

Insertion of platysma

The pectoralis major and deltoid muscles

23

Action of platysma

Tenses the skin of the neck.

24

Origin of temporalis muscle

Floor of the temporal fossa

25

Insertion of temporalis muscle

Coronoid process of the
mandible

26

Innervation of temporalis muscle

Mandibular nerve, V3

27

Action of temporalis muscle

Elevation and retraction of the mandible for mastication

28

Origin of masseter muscle

Zygomatic arch

29

Insertion of masseter muscle

Lateral surface of the ramus, coronoid process and angle of the mandible

30

Innervation of masseter muscle

Mandibular nerve, V3