Prevertebral Muscles

Question 1

Longus colli m. - superior attachment

Answer 1

• anterior tubercle of C1 vertebra (atlas)

- bodies of C1-3 and TP of C3-6 vertebrae

Question 2

Longus colli m. - inferior attachment

Answer 2

• bodies of C5-T3 vertebrae

- TP C3-5 vertebrae

Question 3

Longus colli m. - innervation

Answer 3

anterior rami of C2-6 spinal nerves

Question 4

Longus colli m. - action

Answer 4

flexes neck with rotation to opp side

Question 5

Longus capitis m. - origin

Answer 5

basilar part of occipital bone

Question 6

Longus capitis m. - insertion

Answer 6

anterior tubercles of C3-6 TP

Question 7

Longus capitis m. - innervation

Answer 7

anterior rami of C1-3 spinal nerves

Question 8

Longus capitis m., Rectus capitis anterior m., Anterior scalene m. - action

Answer 8

Flex head

Question 9

Rectus capitis anterior m. - origin

Answer 9

base of cranium, just anterior to occipital condyle

Question 10

Rectus capitis anterior m. - insertion

Answer 10

anterior surface of lateral mass of atlas (C1)

Question 11

Rectus capitis anterior m. - innervation

Answer 11

branches from loop b/t C1, C2 spinal nerves

Question 12

Anterior scalene m. - origin

Answer 12

TP of C3-6

Question 13

Anterior scalene m. - insertion

Answer 13

1st rib

Question 14

Anterior scalene m. - innervation

Answer 14

Cervical spinal nerves C4-6

Question 15

Rectus capitis lateralis m. - origin

Answer 15

jugular process of occipital bone

Question 16

Rectus capitis lateralis m. - insertion

Answer 16

TP of C1/ atlas

Question 17

Rectus capitis lateralis m. - innervation

Answer 17

branches from loop b/t C1, 2 spinal n.

Question 18

Rectus capitis lateralis m. - action

Answer 18

flexes head and helps stabilize

Question 19

Splenius capitis m. - origin

Answer 19

inferior half of nuchal ligament and SP of superior 6 T/S vertebrae

Question 20

Splenius capitis m. - insertion

Answer 20

lateral aspect of mastoid process and lateral third of superior nuchal line

Question 21

Splenius capitis m. - innervation

Answer 21

posterior rami of middle cervical spinal nerves

Question 22

Splenius capitis m. - action

Answer 22

• unilaterally: laterally flex and rotate head and neck to same side
• bilaterally: extend head and neck

Question 23

Levator scapulae m. - origin

Answer 23

posterior tubercles of TP C2-6

Question 24

Levator scapulae m. - insertion

Answer 24

superior part of medial border of scapula

Question 25

Levator scapulae m. - innervation

Answer 25

dorsal scapular n. C5 and cervical spinal n. C3,4

Question 26

Levator scapulae m. - action

Answer 26

downward rotation of scapula and tilts its glenoid cavity inferiorly by rotating scapula

Question 27

Middle scalene m., Posterior scalene m. - origin

Answer 27

Posterior tubercles of TP C5-C7

Question 28

Middle scalene m. - insertion

Answer 28

superior surface of 1st rib, posterior to groove for subclavian a.

Question 29

Middle scalene m. - innervation

Answer 29

anterior rami of cervical spinal n.

Question 30

Middle scalene m. - action

Answer 30

- flexes neck laterally | - elevates 1st rib during forced inspiration

Question 31

Posterior scalene m. - insertion

Answer 31

external border of 2nd rib

Question 32

Posterior scalene m. - innervation

Answer 32

anterior rami of cervical spinal n. C7,8

Question 33

Posterior scalene m. - action

Answer 33

- flexes neck laterally | - elevates 2nd rib during forced inspiration

Question 34

Anterior vertebral muscles

Answer 34

- Longus colli m. - Longus capitis m. - Rectus capitis anterior m. - Anterior scalene m.

Question 35

Lateral vertebral muscles

Answer 35

- Rectus capitis lateralis m. - Splenius capitis m. - Levator scapulae m. - Middle scalene m. - Posterior scalene m.