Phrenic Nerve

Question 1

Course of RIGHT Phrenic Nerve

Answer 1

1. pass anteriorly to 2nd part of subclavian artery and posteriorly subclavian vein
2. descends anteriorly to the right lung root down the right side of the pericardium
3. reaches the dialphragm and pierces muscle to sup underlying surface

Question 2

course of phrenic nerve (3)

Answer 2

1. pass anteriorly to 1st part subclass art and post subclass vein
2. cross AArch and VN and descends anteriorly to LEFT lung root, down left side pericardium
3. reaches diaphragm and pierces Muscle to supp undelrying surface

Question 3

Nerve Roots of Phrenic Nerve

Answer 3

Anterior Rami of C3, C4 and C5

Question 4

Motor funky of phrenic nerve

Answer 4

inn diaphragm

Question 5

sensory funky of phrenic nerve

Answer 5

1. inn the central part diaphragm
2. the pericardium
3. mediastinal part of parietal pleura

Question 6

Where does phrenic nerve begin?

Answer 6

lateral border of the ant.scalene muscle.

Question 7

where does phrenic nerve continue after beginning at lat bored of ASM?

Answer 7

continues inferiorly over the anterior scalene, deep to prevertebral layer of deep cervical fascia.

from here, course of phrenic nerve differs between left and right.