3. Typical Thoracic Spinal Nerve

Question 1

Identify 1 → 6

Answer 1

1. Anterior root
2. Posterior root
3. Spinal nerve
4. Sympathetic ganglion
5. Anterior ramus (Intercostal nerve)
6. Posterior ramus

Question 2

The anterior ramus divides into a (1)___ at the midaxillary line

→ anteriorly, and lateral to the sternum, it gives rise to an (2)___.

→ The intercostal nerves course between the (3)___ and (4)___ muscles.

Answer 2

1. lateral cutaneous branch
2. anterior cutaneous branch
3. internal intercostal
4. innermost intercostal

Question 3

Identify 7 → 11

Answer 3

7. Lateral cutaneous branch
8. Innermost intercostal muscle
9. Internal intercostal muscle
10. External intercostal muscle
11. Anterior cutaneous branch

Question 4

What form the spinal nerve?

Answer 4

Posterior and anterior roots combine to form the spinal nerve

Question 5

Posterior and anterior roots combine to form the spinal nerve, which divides into a small (1)___ that supplies the (2)____ of the back and a larger (3)___ (intercostal nerve) that innervates all the muscles (4)____ (3w)

Answer 5

1. posterior ramus
2. intrinsic muscles
3. anterior ramus
4. lining the trunk.

Question 6

The first 11 thoracic nerves give rise to (1)___ that constitute the intercostal nerves (T12 is the subcostal nerve, and it is inferior to the 12th rib).

(2)___ accompany the intercostal nerves

Answer 6

1. anterior rami
2. Intercostal arteries and veins