Lab Practical 1 - Innervation & Action

Question 1

Innervation: Trapezius

Answer 1

spinal accessory nerve, C1-C5 cord levels

Question 2

Innervation: Latissimus Dorsi

Answer 2

thoracodorsal nerve, ventral rami C6-C8

Question 3

Innervation: Levator Scapulae

Answer 3

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

Question 4

Innervation: Rhomboid Major

Answer 4

dorsal scapular nerve, ventral ramus C5 plus ventral ramus C4

Question 5

Innervation: Rhomboid Minor

Answer 5

dorsal scapular nerve, ventral ramus C5 plus ventral ramus C4

Question 6

Innervation: Splenius Capitis

Answer 6

dorsal rami C3-C5

Question 7

Innervation: Splenius Cervicis

Answer 7

dorsal rami C5-C7

Question 8

Innervation: Iliocostalis Lumborum

Answer 8

dorsal rami lower T, all L

Question 9

Innervation: Iliocostalis Thoracis

Answer 9

dorsal rami T1-T6

Question 10

Innervation: Iliocostalis Cervicis

Answer 10

dorsal rami T1, T2; rarely C8

Question 11

Innervation: Longissimus Thoracis

Answer 11

dorsal rami T & L nerves

Question 12

Innervation: Longissimus Cervicis

Answer 12

dorsal rami C4-C8; T1-T2

Question 13

Innervation: Longissimus Capitis

Answer 13

dorsal rami C1-C3, sometimes C4

Question 14

Innervation: Spinalis Thoracis

Answer 14

dorsal rami T & upper L

Question 15

Innervation: Spinalis Cervicis

Answer 15

dorsal rami C

Question 16

Innervation: Spinalis Capitis

Answer 16

dorsal rami lower C, upper T

Question 17

Innervation: Semispinalis Thoracis

Answer 17

dorsal rami T1-T6

Question 18

Innervation: Semispinalis Cervicis

Answer 18

dorsal rami C6-C8

Question 19

Innervation: Semispinalis Capitis

Answer 19

dorsal rami C1-C6

Question 20

Innervation: Multifidus

Answer 20

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

Question 21

Innervation: Rectus Capitis Posterior Major

Answer 21

suboccipital nerve, dorsal ramus C1

Question 22

Innervation: Rectus Capitis Posterior Minor

Answer 22

suboccipital nerve, dorsal ramus C1

Question 23

Innervation: Obliquus Capitis Superior

Answer 23

suboccipital nerve, dorsal ramus C1

Question 24

Innervation: Obliquus Capitis Inferior

Answer 24

suboccipital nerve, dorsal ramus C1

Question 25

Innervation: Quadratus Lumborum

Answer 25

ventral rami T12, L1-L3 or L4

Question 26

Innervation: Serratus Posterior Superior

Answer 26

intercostal nerves, ventral rami T2-T5

Question 27

Innervation: Serratus Posterior Inferior

Answer 27

intercostal nerves, ventral rami T9-T11; subcostal nerve, ventral ramus T12

Question 28

Innervation: Longus Colli

Answer 28

ventral rami C2-C6, sometimes C7

Question 29

Innervation: Longus Capitis

Answer 29

ventral rami C1-C3

Question 30

Innervation: Rectus Capitis Anterior

Answer 30

ventral rami C1, C2

Question 31

Innervation: Rectus Capitis Lateralis

Answer 31

ventral rami C1, C2

Question 32

Innervation: Anterior Scalene

Answer 32

ventral rami C2-C6

Question 33

Innervation: Middle Scalene

Answer 33

ventral rami C3-C8

Question 34

Innervation: Posterior Scalene

Answer 34

ventral rami C6-C8

Question 35

Action: Splenius Capitis

Answer 35

1. Laterally flex head & rotate face to side | 2. Bilaterally extend head

Question 36

Action: Splenius Cervicis

Answer 36

1. Laterally flex & rotate neck | 2. Bilaterally extend neck

Question 37

Action: Iliocostalis Lumborum

Answer 37

1. Extension 2. Lateral flexion 3. Rotation of L spine 4. Lateral movement of pelvis

Question 38

Action: Iliocostalis Thoracis

Answer 38

1. Extension | 2. Lateral flexion T spine

Question 39

Action: Iliocostalis Cervicis

Answer 39

1. Extension 2. Lateral flexion 3. Rotation lower C spine

Question 40

Action: Longissimus Thoracis

Answer 40

1. Lateral flexion T spine & ribs (L spine inadvertently) 2. Bilaterally act in extension of T & L spine, hold T & L spine erect (increases L lordosis) 3. Lateral movement of pelvis

Question 41

Action: Longissimus Cervicis

Answer 41

1. Lateral flexion of neck | 2. Bilaterally extend neck

Question 42

Action: Longissimus Capitis

Answer 42

1. Rotate & laterally flex head | 2. Bilaterally extend neck

Question 43

Action: Spinalis Thoracis

Answer 43

1. Extend T spine

Question 44

Action: Spinalis Cervicis

Answer 44

1. Lateral flexion & rotation of C spine | 2. Bilaterally extend neck

Question 45

Action: Spinalis Capitis

Answer 45

1. Lateral flexion & rotation of head | 2. Bilaterally extend head

Question 46

Action: Semispinalis Thoracis

Answer 46

1. Extension, rotation & lateral flexion of upper T & lower C spine 2. Bilaterally extend T spine

Question 47

Action: Semispinalis Cervicis

Answer 47

1. Extension, rotation & lateral flexion of C spine | 2. Bilaterally extend neck

Question 48

Action: Semispinalis Capitis

Answer 48

1. Turns face to side | 2. Bilaterally extends head (neck inadvertently)

Question 49

Action: Rectus Capitis Posterior Major

Answer 49

1. Turns face to side | 2. Bilaterally extends head

Question 50

Action: Rectus Capitis Posterior Minor

Answer 50

1. Extends head

Question 51

Action: Obliquus Capitis Superior

Answer 51

1. Lateral flexion of head | 2. Bilaterally extends head

Question 52

Action: Obliquus Capitis Inferior

Answer 52

1. Turns face to side

Question 53

Action: Quadratus Lumborum

Answer 53

1. Steadies origin of diaphragm 2. When pelvis is fixed, lateral flexion of the L spine 3. Bilaterally extends the L spine 4. Stabilizes & depresses the 12th rib

Question 54

Action: Serratus Posterior Superior

Answer 54

1. Elevate upper 5 ribs in inspiration

Question 55

Action: Serratus Posterior Inferior

Answer 55

1. Draws lower 4 ribs down & back | 2. Forced inspiration

Question 56

Action: Longus Colli

Answer 56

1. Flexion & extension of neck | 2. Rotation to the contralateral side

Question 57

Action: Longus Capitis

Answer 57

1. Flex the head

Question 58

Action: Rectus Capitis Anterior

Answer 58

1. Flex the head

Question 59

Action: Rectus Capitis Lateralis

Answer 59

1. Laterally flex the head to ipsilateral side