lab test muscle innervations and action

Question 0

latissimus dorsi

Answer 0

thoracodorsal nerve, ventral rami c6-c8

Question 1

trapezius

Answer 1

spinal accessory nerve, c1-c5 cord levels

Question 2

levator scapulae

Answer 2

dorsal scapular nerve, ventral ramus c5 plus ventral rami c3,c4

Question 3

rhomboid major

Answer 3

dorsal scapular nerve, ventral ramus c5 plus ventral ramus c4

Question 4

rhomboid minor

Answer 4

dorsal scapular nereve, ventral ramus c5 plus ventral ramus c4

Question 5

splenius capitis

Answer 5

Dorsal rami c3-c5. laterally flex head and rotate face to side; bilaterally extend head

Question 6

splenius cervicis

Answer 6

dorsal rami c5-c7. laterally flex and rotate neck; bilaterally extend neck

Question 7

iliocostalis lumborum

Answer 7

dorsal rami lower thoracics and all lumbar. extension, lateral flexion, rotation of L spine; lateral movement of pelvis

Question 8

iliocostalis thoracis

Answer 8

dorsal rami of t1-t6. extension, lateral flexion thoracic spine

Question 9

iliocostalis cervicis

Answer 9

dorsal rami t1, t2; rarely c8. extension, lateral flexion, rotation lower cervical spine

Question 10

longissimus thoracis

Answer 10

dorsal rami thoracic and lumbar nerves. laterally flex t spine and ribs; bilaterally act in extension of T and L spine, hold T and L spine erect; 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 and laterally flex head; bilaterally extend head

Question 13

spinalis thoracis

Answer 13

dorsal rami thoracic and upper lumbar. extend thoracic spine

Question 14

spinalis cervicis

Answer 14

dorsal rami cervical. lateral flexion and rotation of cervical spine; bilaterally extend neck

Question 15

spinalis capitis

Answer 15

dorsal rami lower cervical, upper thoracic. lateral flexion and rotation of head; bilaterally extend head

Question 16

semispinalis thoracis

Answer 16

dorsal rami t1-t6. extension, rotation, and lateral flexion of upper thoracic and lower cervical spine; bilaterally extend thoracic spine

Question 17

semispinalis cervicis

Answer 17

dorsal rami c6-c8. extension, rotation, and lateral flexion of cervical spine; bilaterally extend neck

Question 18

semispinalis capitis

Answer 18

dorsal rami c1-c6. turns face to side; bilaterally extends head

Question 19

multifidus

Answer 19

dorsal rami c3-c8, t1-t12, li-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 is fixed, it will laterally flex the L spine; bilaterally extends the L spine; stabilizes and 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 and back; forced inspiration.

Question 27

longus colli

Answer 27

ventral rami c2-c6, sometimes c7.flexion and 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