Spinal Lab Prac 1 Innervations

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 + ventral rami C3, C4

Question 4

Rhomboid Major

Rhomboid Minor

Answer 4

dorsal scapular nerve, ventral ramus C5 + ventral ramus C4

Question 5

Splenius Capitis *

Answer 5

dorsal rami C3-C5

Laterally flex head & rotate face to side
Bilaterally extend head

Question 6

Splenius Cervicis *

Answer 6

dorsal rami C5-C7

Laterally flex & rotate neck;
Bilaterally extend neck

Question 7

Iliocostalis Lumborum *

Answer 7

dorsal rami lower T, all L

Extension, lateral flexion, rotation of L spine;
Lateral movement of pelvis

Question 8

Iliocostalis Thoracis *

Answer 8

dorsal rami T1-T6

Extension, lateral flexion T spine

Question 9

Iliocostalis Cervicis *

Answer 9

dorsal rami T1, T2; rarely C8

Extension, lateral flexion, rotation lower C spine

Question 10

Longissimus Thoracis *

Answer 10

dorsal rami T & L nerves

Lateral flexion T spine & ribs (L spine inadvertently);
Bilaterally act in extension of T & L spine, hold T & L spine erect (increase L lordosis);
Lateral movement of pelvis

Question 11

Longissimus Cervicis *

Answer 11

dorsal rami C4-C8; T1-T2

Lateral flexion of neck;
Bilaterally extend neck

Question 12

Longissimus Capitis *

Answer 12

dorsal rami C1-C3, sometimes C4

Rotate & laterally flex head;
Bilaterally extend head

Question 13

Spinalis Thoracis *

Answer 13

dorsal rami T & upper L

Extend T spine

Question 14

Spinalis Cervicis *

Answer 14

dorsal rami C

Lateral flexion & rotation of C spine;
Bilaterally extend neck

Question 15

Spinalis Capitis *

Answer 15

dorsal rami lower C, upper T

Lateral flexion & rotation of head
Bilaterally extend head

Question 16

Semispinalis Thoracis *

Answer 16

dorsal rami T1-T6

Extension, rotation & lateral flexion of upper T & lower C spine;
Bilaterally extend T spine

Question 17

Semispinalis Cervicis *

Answer 17

dorsal rami C6-C8

Extension, rotation & lateral flexion of C spine;
Bilaterally extend neck

Question 18

Semispinalis Capitis *

Answer 18

dorsal rami C1-C6

Turns face to side;
Bilaterally extends head (neck inadvertently)

Question 19

Multifidus

Answer 19

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

Question 20

Rectus Capitis Posterior Major *

Answer 20

suboccipital nerve, dorsal ramus C1

Turns face to side;
Bilaterally extends head

Question 21

Rectus Capitis Posterior Minor *

Answer 21

suboccipital nerve, dorsal ramus C1

Extends head

Question 22

Obliquus Capitis Superior *

Answer 22

suboccipital nerve, dorsal ramus C1

Lateral flexion of head;
Bilaterally extends head

Question 23

Obliquus Capitis Inferior *

Answer 23

suboccipital nerve, dorsal ramus C1

Turns face to side

Question 24

Quadratus Lumborum *

Answer 24

ventral rami T12, L1-L3 or L4

Steadies origin of diaphragm;
When pelvis fixed it will laterally flex the L spine

Bilaterally extends the L spine; stabilizes & depresses the 12th rib

Question 25

Serratus Posterior Superior *

Answer 25

intercostal nerves, ventral rami T2-T5

Elevate upper 5 ribs in inspiration

Question 26

Serratus Posterior Inferior *

Answer 26

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

Draws lower 4 ribs down & back;
Forced inspiration

Question 27

Longus Colli *

Answer 27

ventral rami C2-C6 , sometimes C7

Flexion & extension of neck;
Rotation to the contralateral side

Question 28

Longus Capitis *

Answer 28

ventral rami C1-C3

Flex the head

Question 29

Rectus Capitis Anterior *

Answer 29

ventral rami C1, C2

Flex the head

Question 30

Rectus Capitis Lateralis *

Answer 30

ventral rami C1, C2

Laterally flex the head to ipsilateral side

Question 31

Anterior Scalene

Answer 31

ventral rami C2-C6

Question 32

Middle Scalene

Answer 32

ventral rami C3-C8

Question 33

Posterior Scalene

Answer 33

ventral rami C6-C8