This plexus is situated in front of the pericardium, and beneath the concavity of the arch of the aorta. It is formed by (a) the cardiac branch from the superior cervical ganglion of the left sympathetic cord, and (b) the inferior cervical cardiac branch of the left vagus. A small ganglion, the ganglion of Wrisberg, is found at the junction of the nerves.
(1) To the left half of the deep cardiac plexus.
(2) To the left anterior pulmonary plexus.
(3) Along the right coronary artery to the heart muscle.