Muscles and Nerves: Facial expression, extra-ocular, mastication

Question 1

Origin of Buccinator

Answer 1

Alveolar processes of maxilla and mandible opposite the molar teeth

Question 2

Insertion of Buccinator

Answer 2

Blends into fibers of orbicularis oris

Question 3

Action of Buccinator

Answer 3

Compresses cheeks

Question 4

Innervation of Buccinator

Answer 4

FACIAL N VII

Question 5

Origin of Orbicularis Oris

Answer 5

maxilla and mandible

Question 6

Insertion of Orbicularis Oris

Answer 6

Lips

Question 7

Action of Orbicularis Oris

Answer 7

compresses/ purses LIPS (kissing)

Question 8

Innervation of Orbicularis Oris

Answer 8

FACIAL N VII

Question 9

Origin of Orbicularis Oculi

Answer 9

Medial Margin of Orbit

Question 10

Insertion of Orbicularis Oculi

Answer 10

Skin around eyelids

Question 11

Action of Orbicularis Oculi

Answer 11

Closes eye

Question 12

Innervation of Orbicularis Oculi

Answer 12

FACIAL N VII

Question 13

Origin of Platysma

Answer 13

Fascia covering the superior parts of the pectoralis major and deltoid

Question 14

Insertion of Platysma

Answer 14

Mandible and skin of cheek

Question 15

Action of Platysma

Answer 15

Tenses skin of NECK,

Depresses MANDIBLE

Question 16

Innervation of Platysma

Answer 16

FACIAL N VII

Question 17

Origin of Inferior Rectus

Answer 17

SPHENOID around OPTIC CANAL

Question 18

Insertion of Inferior Rectus

Answer 18

INFERIOR, MEDIAL surface of eyeball

Question 19

Action of Inferior Rectus

Answer 19

Eye looks DOWN

Question 20

Innervation of Inferior Rectus

Answer 20

OCULOMOTOR N III

Question 21

Origin of Medial Rectus

Answer 21

SPHENOID around OPTIC CANAL

Question 22

Insertion of Medial Rectus

Answer 22

MEDIAL surface of eyeball

Question 23

Action of Medial Rectus

Answer 23

Eye look MEDIALLY

Question 24

Innervation of Medial Rectus

Answer 24

OCULOMOTOR N III

Question 25

Origin of Superior Rectus

Answer 25

SPHENOID around OPTIC CANAL

Question 26

Insertion of Superior Rectus

Answer 26

SUPERIOR surface of eyeball

Question 27

Action of Superior Rectus

Answer 27

Eye looks UP

Question 28

Origin of Lateral Rectus

Answer 28

SPHENOID around OPTIC CANAL

Question 29

Insertion of Lateral Rectus

Answer 29

LATERAL surface of eyeball

Question 30

Action of Lateral Rectus

Answer 30

Eye looks LATERALLY

Question 31

Innervation of Lateral Rectus

Answer 31

ABDUCENS N VI

Question 32

Origin of Inferior Oblique

Answer 32

MAXILLA at ANTERIOR portion of ORBIT

Question 33

Insertion of Inferior Oblique

Answer 33

INFERIOR, | LATERAL surface of eyeball

Question 34

Action of Inferior Oblique

Answer 34

eye ROLLS, | looks UP and LATERALLY

Question 35

Origin of Superior Oblique

Answer 35

SPHENOID around OPTIC CANAL

Question 36

Insertion of Superior Oblique

Answer 36

SUPERIOR, | LATERAL surface of eyeball

Question 37

Action of Superior Oblique

Answer 37

eye ROLLS, | looks DOWN and LATERALLY

Question 38

Origin of Masseter

Answer 38

APONEUROSIS and BONES of the ZYGOMATIC ARCH

Question 39

Insertion of Masseter

Answer 39

LATERAL surface and ANGLE of MANDIBULAR RAMUS

Question 40

Action of Masseter

Answer 40

1. Elevates MANDIBLE and CLOSES JAW 2. ASSISTS in PROTRACTING/ RETRACTING MANDIBLE 3. ASSISTS in moving MANDIBLE SIDE TO SIDE (LATERAL EXCURSION)

Question 41

Innervation of Masseter

Answer 41

TRIGEMINAL N V, | MANDIBULAR BRANCH

Question 42

Origin of Temporalis

Answer 42

along TEMPORAL LINES of SKULL

Question 43

Insertion of Temporalis

Answer 43

1. CORONOID PROCESS of MANDIBLE | 2. ANTERIOR BORDER of the MANDIBULAR RAMUS

Question 44

Action of Temporalis

Answer 44

1. Elevates MANDIBLE and CLOSES JAW 2. ASSISTS in RETRACTING MANDIBLE 3. ASSISTS in moving MANDIBLE SIDE TO SIDE (LATERAL EXCURSION)

Question 45

Innervation of Temporalis

Answer 45

TRIGEMINAL N V, | MANDIBULAR BRANCH

Question 46

Origin of Medial Pterygoid

Answer 46

1. MEDIAL surface of teh LATERAL PTERYGOID PLATE | 2. adjacent portions of PALATINE BONE and MAXILLA

Question 47

Insertion of Medial Pterygoid

Answer 47

MEDIAL surface of MANDIBULAR RAMUS

Question 48

Action of Medial Pterygiod

Answer 48

1. Elevates MANDIBLE and CLOSES JAW | 2. Moves MANDIBLE SIDE TO SIDE (LATERAL EXCURSION)

Question 49

Innervation of Medial Pterygiod

Answer 49

TRIGEMINAL N V, | MANDIBULAR BRANCH

Question 50

Origin of Lateral Pterygoid

Answer 50

1. LATERAL surface of LATERAL PTERYGOID PLATE | 2. GREATER WING of SPHENOID

Question 51

Insertion of Lateral Pterygoid

Answer 51

ANTERIOR PART of the NECK of the MANDIBULAR CONDYLE

Question 52

Innervation of Lateral Pterygoid

Answer 52

TRIGEMINAL N V, | MANDIBULAR BRANCH