Thoracic Anatomy: Vessels and Nerves

Question 1

Order of neurovascular bundle in the intercostal space from superior to inferior…

Answer 1

Vein
Artery
Nerve

Question 2

This space is on the inferior aspect of each rib, and provides partial protection to the intercostal neurovascular bundle…

Answer 2

costal groove

Question 3

How many thoracic spinal nerves?

Answer 3

12 pairs

Question 4

The intercostal nerves are made from the _____ rami of ___ to ____

Answer 4

anterior rami, T1-T11

Question 5

Which nerve originates from the anterior ramus of T12 and travels on the inferior aspect of Rib 12

Answer 5

subcostal n.

Question 6

What allows for communication between intercostal nerves and the sympathetic trunk in the spinal column

Answer 6

rami communicantes

Question 7

Name the 4 broad branches of the intercostal nerves…

Answer 7

Anterior cutaneous branches
Lateral cutaneous branches
muscular branches
rami communicantes

Question 8

Which intercostal nerves are “typical”

Answer 8

3rd-6th

Question 9

Posteriorly and medially, typical intercostal nerves run between what structures?

Answer 9

endothoracic fascia and internal intercostal membrane

Question 10

Typical intercostal nerves course between which structures after the angle of the rib?

Answer 10

internal and innermost intercostals

Question 11

_________ branches of the neurovascular bundle run along the superior surface of the rib’s lateral course.

Answer 11

collateral branches

Question 12

Collateral branches of intercostal nerves give rise to _______.

Answer 12

lateral cutaneous branches

Question 13

At what anatomical point can the lateral cutaneous branches be approximated?

Answer 13

midaxillary line

Question 14

Which ribs become the thoracoabdominal nerves?

Answer 14

7-11 nerves

Question 15

These nerves are atypical and run along the internal surface of the ribs they are associated with

Answer 15

1-2

Question 16

Which dermatome covers the nipple and inferior pectoralis/breast?

Answer 16

T4

Question 17

Which dermatome covers the umbilicus?

Answer 17

T10

Question 18

Which two arteries arise as branches from the axillary artery?

Answer 18

Superior thoracic artery

lateral thoracic artery

Question 19

Intercostal spaces ___ thru ___ are supplied by a posterior intercostal artery, which branches from the thoracic aorta…

Answer 19

3-9

Question 20

The posterior intercostal arteries of spaces 1 and 2 are supplied by… (3)

Answer 20

Subclavian a. –> costocervical trunk –> supreme intercostal a.

Question 21

The anterior intercostal arteries 1 and 2 supply which 3 structures…

Answer 21

pectoral mm
breast
anterior skin of chest wall

Question 22

The internal thoracic arteries arise from…

Answer 22

the subclavian artery

Question 23

the internal thoracic arteries pass inferior from their origin and behind which 2 structures

Answer 23

clavicle and rib 1

Question 24

the internal thoracic arteries pass _____ to the internal intercostal muscles

Answer 24

posterior

Question 25

The internal thoracic arteries pass ______ to the transversus thoracis muscle.

Answer 25

anterior

Question 26

In the 6th intercostal space, the internal thoracic arteries branch to form (2)

Answer 26

superior epigastric artery

musculophrenic artery

Question 27

The anterior intercostal arteries of ribs 1-6 arise from…

Answer 27

internal thoracic artery