Phrenic nerve is

A. Motor nerve to diaphragm

B. Arises chiefly from 3rd cervical nerve, also receives contribution from 4th and 5th cervical nerves

C. The nerve runs vertically on the anterior surface of scalenus anterior

D. It lies anterior to prevertebral fascia

Correct Answer: The nerve runs vertically on the anterior surface of scalenus anterior

Description: Phrenic nerve is a mixed nerve, mainly arises from 4th cervical nerve. It lies behind prevertebral fascia and in front of scalenus anterior.

Category: Anatomy

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