Thoracic and lumbar nerves

Question 1

How many thoracic nerves are there?

Answer 1

12 pairs

Question 2

What does each thoraces nerve divide into?

Answer 2

anterior and posterior primary rami

Question 3

which rami of the thoracic spinal nerve divides into medial and lateral branches?

Answer 3

posterior primary ramus

Question 4

What muscles do the medial branches of the posterior primary rams in the thoracics supply?

Answer 4

semispinalis(upper 6),
longissimus (lower 6)
multifidi

Question 5

what muscles do the lateral branches supply?

Answer 5

longissimus
iliocostalis
levator costarum

Question 6

What do the lateral branches of the posterior primary ramus of the thoracics supply? (Sensory)

Answer 6

sensory to the skin near the costal angles

Question 7

What do the medial branches of the posterior primary rams of the thoracics supply?

Answer 7

sensory to the skin paraspinally

Question 8

Which thoracic spinal nerve contributes to the brachial plexus?

Answer 8

anterior primary ramus of T1

Question 9

What direction does the posterior primary ramus project?

Answer 9

posteriorward

Question 10

What is the course of the anterior primary ramus?

Answer 10

it follows the rib above the nerve

Question 11

Which two thoracic nerves sometimes contribute to the intercostobrachial nerve?

Answer 11

the anterior primary rami of T1 and T2

Question 12

each intercostal nerve gives off what specific branch that divides further into anterior and posterior branches?

Answer 12

lateral cutaneous branch

Question 13

What does the lateral cutaneous branch supply?

Answer 13

sensory to the overlying skin

Question 14

In which branch does the intercostal nerves terminate?

Answer 14

anterior cutaneous branch

Question 15

What do the anterior cutaneous branches supply?

Answer 15

sensory to the skin close to the midline

Question 16

What muscles do the intercostal nerves supply?

Answer 16

internal intercostals
external intercostals
serratus posterior
transverse thoracics
transverse abdomen
internal abdominal oblique
external abdominal oblique
rectus abdominus

Question 17

Which muscles are innervated by the intercostal nerves of T7-T11?

Answer 17

transverse abdomin
internal abdominal oblique
external abdominal oblique
rectus abdominus

Question 18

The intercostal nerves also supply which structures?

Answer 18

the adjacent blood vessels, bones, joints, and ligaments

Question 19

which thoracic nerve contributes to the lumbar plexus?

Answer 19

subcostal nerve T12

Question 20

What’s the longest thoracic nerve?

Answer 20

subcostal nerve T12

Question 21

What does subcostal nerve T12 supply?

Answer 21

skin as far inferior as the superior buttocks

Question 22

how do the thoracic nerves communicate with the sympathetic trunk?

Answer 22

both white and gray ramus communicans

Question 23

The _________ ramus is medial to the ________ ramus.

Answer 23

Gray; White

Question 24

How many pairs of lumbar nerves are there?

Answer 24

5 pairs

Question 25

how are the lumbar nerves names?

Answer 25

for the vertebra above

Question 26

What does each number nerve divide into?

Answer 26

anterior and posterior primary ramus

Question 27

The anterior primary ramus contributes to which plexuses?

Answer 27

lumbar and sacral plexuses

Question 28

The posterior primary ramus divides into which two branches?

Answer 28

medial and lateral branches

Question 29

Which muscles do the medial branches supply?

Answer 29

multifidis

Question 30

Which muscles doe the medial branches supply?

Answer 30

erector spinae group

Question 31

How do the lumbar nerves communicate with the sympathetic trunk?

Answer 31

white and gray rami communicans

Question 32

The white rami communicants are associated with what nerves?

Answer 32

L1, L2, and sometimes L3

Question 33

What lumbar nerves are associated with Gray rami comunicans?

Answer 33

each lumbar nerve

Question 34

What nerves supply the multifidis?

Answer 34

medial branches of thoracic and lumbar nerve