system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
True about left phrenic nerve
assistant
The correct answer is  The phrenic nerves contain motor, sensory, and sympathetic nerve fibers. The phrenic nerve originates mainly from the 4th cervical nerve, but also receives contributions from the 5th and 3rd cervical nerves Both phrenic nerves run from C3, C4, and C5 along the anterior scalene muscle deep to the carotid sheath. The accessory phrenic nerve is a branch of the nerve to the subclavius Ref: BD Chaurasia; 7th edition