Lab 1 - Innervations and Actions

Question 1

Innervation of trapezius?

Answer 1

spinal accessory nerve, C1-C5 cord levels

Question 2

Innervation of latissimus dorsi?

Answer 2

thoracodorsal nerve, ventral rami C6-C8

Question 3

Innervation of levator scapulae?

Answer 3

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

Question 4

Innervation of rhomboid major?

Answer 4

dorsal scapular nerve, ventral ramus C5 plus ventral rami C4

Question 5

Innervation of rhomboid minor?

Answer 5

dorsal scapular nerve, ventral ramus C5 plus ventral ramus C4

Question 6

Innervation of splenius capitis?

Answer 6

dorsal rami C3-C5

Question 7

Action of splenius capitis?

Answer 7

• laterally flex head and rotate face to side

- bilaterally extend head

Question 8

Innervation of splenius cervicis?

Answer 8

dorsal rami C5-C7

Question 9

Action of splenius cervicis?

Answer 9

• laterally flex and rotate neck

- bilaterally extend neck

Question 10

Innervation of iliocostalis lumborum?

Answer 10

dorsal rami lower T, all L

Question 11

Action of iliocostalis lumborum?

Answer 11

• extension, lateral flexion, rotation of L spine

- lateral movement of pelvis

Question 12

Innervation of iliocostalis thoracis?

Answer 12

dorsal rami T1-T6

Question 13

Action of iliocostalis thoracis?

Answer 13

• extension

- lateral flexion T spine

Question 14

Innervation of iliocostalis cervicis?

Answer 14

dorsal rami T1, T2; rarely C8

Question 15

Action of iliocostalis cervicis?

Answer 15

• extenion
• lateral flexion
• rotation lower C spine

Question 16

Innervation longissimus thoracis?

Answer 16

dorsal rami T and L nerves

Question 17

Action of longissimus thoracis?

Answer 17

• 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 18

Innervation of longissimus cervicis?

Answer 18

dorsal rami C4-C8; T1-T2

Question 19

Action of longissimus cervicis?

Answer 19

• lateral flexion of neck

- bilaterally extend

Question 20

Innervation of longissimus capitis?

Answer 20

dorsal rami C1-C3, sometimes C4

Question 21

Action of longissimus capitis?

Answer 21

• rotate and laterally flex head

- bilaterally extend head

Question 22

Innervation of spinalis thoracis?

Answer 22

dorsal rami T and upper L

Question 23

Action of spinalis thoracis?

Answer 23

extend T spine

Question 24

Innervation of spinalis cervicis?

Answer 24

dorsal rami C

Question 25

Action of spinalis cervicis?

Answer 25

- lateral flexion and rotation of C spine | - bilaterally extend neck

Question 26

Innervation of spinalis capitis?

Answer 26

dorsal rami lower C, upper T

Question 27

Action of spinalis capitis?

Answer 27

- lateral flexion and rotation of head | - bilaterally extend head

Question 28

Innervation of semispinalis thoracis?

Answer 28

dorsal rami T1-T6

Question 29

Action semispinalis thoracis?

Answer 29

- extension, rotation and lateral flexion of upper T and lower C - bilaterally extend T spine

Question 30

Innervation of semispinalis cervicis ?

Answer 30

dorsal rami C6-C8

Question 31

Action of semispinalis cervicis?

Answer 31

- extension, rotation and lateral flexion of C spine | - bilaterally extend

Question 32

Innervation of semispinalis capitis?

Answer 32

dorsal rami C1-C6

Question 33

Action of semispinalis capitis?

Answer 33

- turns face to side | - bilaterally extends head (neck inadvertently)

Question 34

Innervation of multifidus?

Answer 34

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

Question 35

Innervation of rectus capitis posterior major?

Answer 35

suboccipital nerve, dorsal ramus C1

Question 36

Action of rectus capitis posterior major?

Answer 36

- turns face to side | - bilaterally extends head

Question 37

Innervation of rectus capitis posterior minor?

Answer 37

suboccipital nerve, dorsal ramus C1

Question 38

Action of rectus capitis posterior minor?

Answer 38

extends head

Question 39

Innervation of obliquus capitis superior?

Answer 39

suboccipital nerve, dorsal ramus C1

Question 40

Action of obliquus capitis superior?

Answer 40

- lateral flexion of head | - bilaterally extends head

Question 41

Innervation of obliquus capitis inferior?

Answer 41

suboccipital nerve, dorsal ramus C1

Question 42

Action of obliquus capitis inferior?

Answer 42

turns face to side

Question 43

Innervation of quadratus lumborum?

Answer 43

ventral rami T12, L1-L3 or L4

Question 44

Action of quadratus lumborum?

Answer 44

- steadies origin of diaphragm - when pelvis is fixed, it will laterally flex the L spine - bilaterally extends the L spine - stabilizes and depresses the 12 rib

Question 45

Innervation of serratus posterior superior?

Answer 45

intercostal nerves, ventral rami T2-T5

Question 46

Action of serratus posterior superior?

Answer 46

elevate upper 5 ribs in inspiration

Question 47

Innervation of serratus posterior inferior?

Answer 47

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

Question 48

Action of serratus posterior inferior?

Answer 48

- draws lower 4 ribs down and back | - forced inspiration

Question 49

Innervation of longus colli?

Answer 49

ventral rami C2-C6, sometimes C7

Question 50

Action of longus colli?

Answer 50

- flexion and extension of neck | - rotation to the contralateral side

Question 51

Innervation of longus capitis?

Answer 51

ventral rami C1-C3

Question 52

Action of longus capitis?

Answer 52

flex the head

Question 53

Innervation of rectus capitis anterior?

Answer 53

ventral rami C1, C2

Question 54

Action of rectus capitis anterior?

Answer 54

flex the head

Question 55

Innervation of rectus capitis lateralis?

Answer 55

ventral rami C1, C2

Question 56

Action of rectus capitis lateralis?

Answer 56

laterally flex the head to ipsilateral side

Question 57

Innervation of anterior scalene?

Answer 57

ventral rami C2-C6

Question 58

Innervation of middle scalene?

Answer 58

ventral rami C3-C8

Question 59

Innervation of posterior scalene?

Answer 59

ventral rami C6-C8