GENERAL HISTOLOGY

Detailed explanation-1: -The phrenic nerve originates from the anterior rami of the C3 through C5 nerve roots and consists of motor, sensory, and sympathetic nerve fibers. It provides complete motor innervation to the diaphragm and sensation to the central tendon aspect of the diaphragm.

Detailed explanation-2: -The phrenic nerve provides the primary motor supply to the diaphragm, the major respiratory muscle. Phrenic nerve injury, such as may occur from cardiothoracic surgery, can lead to diaphragmatic paralysis or dysfunction.

Detailed explanation-3: -The phrenic nerve controls the diaphragm, the dome-shaped muscle that is primarily responsible for breathing. Contraction of the diaphragm expands the lungs and draws air into them. The phrenic nerve performs this function multiple times per minute throughout your lifetime.

Detailed explanation-4: -The cervical plexus is a complex neurologic structure located within the head and neck. The large portion of the cervical plexus is the communication between the anterior divisions of C1 through C4 nerves.