Practical 1 - Innervations and Actions

Question 1

Trapezius

Answer 1

spinal accessory nerve, C1-C5 cord levels

Question 2

Latissimus Dorsi

Answer 2

thoracodorsal nerve, ventral rami C6-C8

Question 3

Levator Scapulae

Answer 3

dorsal scapular nerve, ventral ramus C5 plus ventral rami C3, C4

Question 4

Rhomboid Major

Answer 4

dorsal scapular nerve, ventral ramus C5 plus ventral ramus C4

Question 5

Rhomboid Minor

Answer 5

dorsal scapular nerve, ventral ramus C5 plus ventral ramus C4

Question 6

Splenius Capitis

Answer 6

dorsal rami C3-C5

Action:
Laterally flex head and rotate face to side; bilaterally extend head

Question 7

Splenius Cervicis

Answer 7

dorsal rami C5-C7

Action:
Laterally flex and rotate neck; bilaterally extend neck

Question 8

Iliocostalis Lumborum

Answer 8

dorsal rami lower T, all L

Action:
Extension, lateral flexion, rotation of L spine; lateral movement of pelvis

Question 9

Iliocostalis Thoracis

Answer 9

dorsal rami T1-T6

Action:
Extension, lateral flexion T spine

Question 10

Iliocostalis Cervicis

Answer 10

dorsal rami T1, T2; rarely C8

Action:
extension, lateral flexion, rotation lower C spine

Question 11

Longissimus Thoracis

Answer 11

dorsal rami T and L nerves

Action:
lateral flexion T spine and ribs (L spine inadvertently); bilaterally act in extension of T and L spine, hold T and L spine erect (increases L lordosis); lateral movement of pelvis

Question 12

Longissimus Cervicis

Answer 12

dorsal rami C4-C8; T1-T2

Action:
lateral flexion of head; bilaterally extend head

Question 13

Longissimus Capitis

Answer 13

dorsal rami C1-C3, sometimes C4

Action:
rotate and laterally flex head; bilaterally extend head

Question 14

Spinalis Thoracis

Answer 14

dorsal rami T and upper L

Action:
extend T spine

Question 15

Spinalis Cervicis

Answer 15

dorsal rami C

Action:
lateral flexion and rotation of C spine; bilaterally extend neck

Question 16

Spinalis Capitis

Answer 16

dorsal rami lower C, upper T

Action:
lateral flexion and rotation of head; bilaterally extend head

Question 17

Semispinalis Thoracis

Answer 17

dorsal rami T1-T6

Question 18

Semispinalis Cervicis

Answer 18

dorsal rami C6-C8

Question 19

Semispinalis Capitis

Answer 19

dorsal rami C1-C6

Question 20

Multifidus

Answer 20

dorsal rami C3-C8, T1-T12, L1-L5, sometimes S1

Question 21

Rectus Capitis Posterior Major

Answer 21

suboccipital nerve, dorsal ramus C1

Question 22

Rectus Captitis Posterior Minor

Answer 22

suboccipital nerve, dorsal ramus C1

Question 23

Obliquus Capitis Superior

Answer 23

suboccipitial nerve, dorsal ramus C1

Question 24

Obliquus Capitis Inferior

Answer 24

suboccipital nerve, dorsal ramus C1

Question 25

Quadratus Lumborum

Answer 25

ventral rami T12, L1-L3 or L4

Question 26

Serratus Posterior Superior

Answer 26

intercostal nerves, ventral rami T2-T5

Question 27

Serratus Posterior Inferior

Answer 27

intercostal nerves, ventral rami T9-T11

subcostal nerve, ventral ramus T12

Question 28

Longus Colli

Answer 28

ventral rami C2-C6, sometimes C7

Question 29

Longus Capitis

Answer 29

ventral rami C1-C3

Question 30

Rectus Capitis Anterior

Answer 30

ventral rami C1, C2

Question 31

Rectus Capitis Lateralis

Answer 31

ventral rami C1, C2

Question 32

Anterior Scalene

Answer 32

ventral rami C2-C6

Question 33

Middle Scalene

Answer 33

ventral rami C3-C8

Question 34

Posterior Scalene

Answer 34

ventral rami C6-C8