Module 8

Question 1

What is the difference between the origin of a muscle and the insertion of a muscle?

Answer 1

Original is the attachment of muscle to bone and is stationary, insertion is the attachment of bone to muscle and can move

Question 2

How many muscles are in the head?

Answer 2

6

Question 3

What are the muscles of the head?

Answer 3

Orbicularis oris, orbicularis oculi, zygomaticus major, mass eater, temporal is and lateral pterygoid

Question 4

Origin and insertion: orbicularis oculi?

Answer 4

Origin: maxilla, frontal and lacrimal bone
Insertion: circumference of orbit/eye

Question 5

Origin and insertion: orbicularis oris?

Answer 5

Origin: tissue of lips
Insertion: under skin of corners of the mouth

Question 6

Origin and insertion: zygomaticus major?

Answer 6

O: zygomatic bone
I:under skin of corners of mouth

Question 7

Origin and insertion: masseter?

Answer 7

O: zygomatic process of maxillae and anterior zygomatic arch
I: mandibular ramus

Question 8

Origin and insertion: temporalis?

Answer 8

O: temporal
I: mandible

Question 9

Origin and insertion: lateral pterygoid?

Answer 9

O: pterygoid process of sphenoid
I: mandible

Question 10

What does the orbicularis oculi do?

Answer 10

Closes eyelids

Question 11

What does the orbicularis oris do?

Answer 11

Protrudes/shaepes/puckers lips

Question 12

What does the zygomaticus major do?

Answer 12

Smiles/lifts up mouth

Question 13

What does the masseter do?

Answer 13

Closes mouth (elevates and protracts the mandible)

Question 14

What does the temporalis do?

Answer 14

Closes mouth (elevates mandible)

Question 15

What does the lateral pterygoid do?

Answer 15

Opens mouth and moves mandible side to side/chewing

Question 16

What nerve innervates the orbicularis oculi and how?

Answer 16

CNVII (facial nerve, temporal branch, thru stylomastoid foramen)

Question 17

What nerve innervates the orbicularis oris and how?

Answer 17

CNVII (facial nerve, buccal branch, thru stylomastoid foramen)

Question 18

What nerve innervates the zygomaticus major and how?

Answer 18

CNVII (facial nerve, zygomatic branch, thru stylomastoid foramen)

Question 19

What nerve innervates the masseter and how?

Answer 19

CNV (trigeminal nerve, mandibular branch thru foramen ovale)

Question 20

What nerve innervates the temporalis and how?

Answer 20

CNV (trigeminal nerve, mandibular branch thru foramen ovale)

Question 21

What nerve innervates the lateral pterygoid and how?

Answer 21

CNV (trigeminal nerve, mandibular branch thru foramen ovale)

Question 22

How many muscles of the neck are there?

Answer 22

6

Question 23

What are they?

Answer 23

Sternocleidomastoid, selenium capitis, rectus abdominus, external and internal oblique, transversus abdominis and diaphragm

Question 24

Origin and insertion: sternocleidomastoid?

Answer 24

O: sternum/manubrium and clavicle
I: temporal (at the mastoid process) and occipital

Question 25

Origin and insertion: splenius capitis?

Answer 25

I: temporal at mastoid process + occipital O: spinous process of thoracic vertebrae

Question 26

Origin and insertion: rectus abdominis?

Answer 26

O: pubis and pubic symphysis I: xiphoid of sternum + ribs 5-7

Question 27

Origin and insertion: external and internal oblique?

Answer 27

O: ilium and ribs 5-12 I: pubis

Question 28

Origin and insertion: transversus abdominis

Answer 28

O: ilium + ribs 5-10 I: linea alba and pubis

Question 29

Origin and insertion: diaphragm

Answer 29

O: xiphoid process of sternum + ribs 6-10 + lumbar vertebrae I: central tendon

Question 30

Which muscles flex the neck?

Answer 30

Sternocleidomastoid

Question 31

Which muscles flex the neck laterally?

Answer 31

Sternocleidomastoid and splenius capitis

Question 32

Which muscles extend the neck?

Answer 32

Splenius capitis

Question 33

Which muscles flex the spine/vertebral column?

Answer 33

Rectus abdominis

Question 34

Which muscles rotate and laterally flex the spine?

Answer 34

External and internal oblique

Question 35

Which muscles compress the abdominal viscera?

Answer 35

Transversus abdominis

Question 36

Which muscles expand thoracic cavity and compress the abdominal cavity?

Answer 36

Diaphragm

Question 37

What nerve innervates the Sternocleidomastoid

Answer 37

CNXI (accessory nerve, thru jugular foramen)

Question 38

What nerve innervates the splenius capitis?

Answer 38

The spinal cervical nerves (C3-C4)

Question 39

What nerve innervates the rectus abdominis

Answer 39

Spinal thoracic nerves (T7-T12)

Question 40

What nerve innervates the external and internal obliques

Answer 40

Spinal thoracic nerves (T7-T12)

Question 41

What nerve innervates the transversus abdominis?

Answer 41

Spinal thoracic nerves (T7-T12)

Question 42

What nerve innervates the diaphragm

Answer 42

phrenic nerve (CNIII-V)