USMLE Forum Archives - USMLE Step 1 - diaphragm
diaphragm
drspleen - 03-17-11 17:58
During week 4 of fetal development, the diaphragm becomes innervated by the phrenic nerves. The phrenic nerves originate from which of the following?
* A. C4, C5, C6
* B. C3, C4
* C. C5, C6, C7
* D. C3, C4, C5
* E. C4, C5
drspleen - 03-17-11 17:58
During week 4 of fetal development, the diaphragm becomes innervated by the phrenic nerves. The phrenic nerves originate from which of the following?
* A. C4, C5, C6
* B. C3, C4
* C. C5, C6, C7
* D. C3, C4, C5
* E. C4, C5
The correct answer and explanation will be available after you answer.
Page 1
#3
Re: diaphragm babbu5508 - 03-18-11 18:58 My answer is: d.
The phrenic nerve originates mainly from the 4th cervical nerve, but also receives contributions from the 5th and 3rd cervical nerves (C3-C5).
#4
Re: diaphragm sudha2015 - 03-19-11 10:26 During week 4 of fetal development, the diaphragm becomes innervated by the phrenic nerves. The phrenic nerves originate from which of the following?
d
#5
Re: diaphragm
drspleen - 03-21-11 18:36 During week 4, the developing diaphragm becomes innervated by the phrenic nerves, which originate from C3, C4, and C5 and pass through the pleuropericardial membranes.
Page 1