Superman

Ed believed that his dad Clark was superman because he could do most everything. In reality, Clark Kent, and the stress is getting to him. Indeed, he has developed an eating disorder, and he is now becoming more of a Supperman. He decides to take a vacation and go horseback riding in Cape Town. Unfortunately, he falls of his horse and suffers the identical lesion that Christopher Reeve (perhaps the best actors to ever play superman) suffered.   Mr. Reeve experience a C3-C5 fracture in his neck and was forever more hooked up to a respirator. Which of the indicated nerve is the one most implicated in lesions of this type that result in a permanent need for a respirator?

Lesion of which nerve impacts respiration the most?