G10

Question 1

Origin of the phrenic nerve

Answer 1

Anterior rami of C3,4,5 keep the diaphragm alive

Question 2

Function of Phrenic nerve

Answer 2

All motor and most sensory of diaphragm

Question 3

Where does the phrenic nerve run?

Answer 3

Anterior to subclavian arteries
Anterior to the base of lungs
Exterior to the pericardium
Attaches to the diaphragm

Question 4

What nerves provide sensory innervation for the peripheral diaphragm?

Answer 4

Intercostal and subcostal nerves

Question 5

What artery branches off the subclavian and runs inferiorly just below the sternum bilaterally?

Answer 5

Internal thoracic artery

Question 6

Internal thoracic artery branches into what vessels?

Answer 6

At 6th intercostal space, branches into the Musculophrenic artery which runs along cartilage of 10th rib, and the superior epigastric artery that runs superficially and medially.

Question 7

What two main arteries provide the branches that form the intercostal arteries?

Answer 7

Thoracic aorta and the internal thoracic arteries.

Question 8

What triangle is deep to the infrascapular fossa and what runs through this space?

Answer 8

Deltopectoral triangle
Cephalic V.
Thoraco-acromial A.
Lateral Pectoral N.

Question 9

What innervates the pectoralis major?

Answer 9

lateral and medial pectoral nn.

Question 10

What innervates the pectoralis minor?

Answer 10

medial pectoral n.

Question 11

What innervates subclavius?

Answer 11

Nerve to subcalvius

Question 12

What nerve runs over the serratus anterior and also innervates this muscle?

Answer 12

Long thoracic n.

Question 13

What does the lateral pectoral n. do and where is it found?

Answer 13

Lateral passes superior to the pectoralis minor and runs deep to pectoralis major.