Jan 9, 2022 · Your phrenic nerve plays a critical role in your respiratory system to aid breathing. It’s the only nerve in your nervous system that provides motor (movement) function to your diaphragm. It sends signals that cause your diaphragm to expand and contract.

The right phrenic nerve passes over the brachiocephalic artery, posterior to the subclavian vein, and then crosses the root of the right lung anteriorly and then leaves the thorax by passing through the vena cava hiatus opening in the diaphragm at the level of T8.

What Is the Phrenic Nerve? You actually have two of these nerves — the right and left phrenic nerves. They both stem from spinal nerves in the neck. They provide both muscle movement...

Feb 13, 2025 · The phrenic nerve is a bilateral, mixed nerve that originates from the cervical nerves in the neck and descends through the thorax to innervate the diaphragm. It is the only source of motor innervation to the diaphragm and therefore plays a crucial role in breathing.

Oct 30, 2023 · The phrenic nerve is a mixed nerve, carrying motor, sensory and sympathetic fibers. It is the only nerve that provides motor innervation to the diaphragm, with the left and right phrenic nerves innervating their corresponding ipsilateral hemidiaphragms.

Sep 13, 2024 · The right phrenic nerve descends just lateral to the right atrium and right ventricle of the heart. It then passes through the vena cava hiatus on its way to the diaphragm. The phrenic nerves then insert into the left dome and right dome of the diaphragm, respectively.

Mar 7, 2023 · Right phrenic nerve. In contrast to the left phrenic nerve, the right is in contact with venous structures and descends lateral to the superior vena cava, right atrium and ventricle, and inferior vena cava before passing through the vena caval foramen to enter the abdominal cavity.

The right Phrenic nerve descends in the thorax along the right side of the right brachiocephalic vein and the superior vena cava. It passes in front of the root of the right lung and runs along the right side of the pericardium, which separates the nerve from the right atrium.

Jul 24, 2023 · In the neck and upper thorax, the left phrenic nerve tracts proximal to the subclavian artery. The right phrenic nerve runs superficial to the anterior scalene muscle and the second part of the right subclavian artery.

The right phrenic nerve is situated more deeply, and is shorter and more vertical in direction than the left; it lies lateral to the right innominate vein and superior vena cava.