Left half The left half of the deep part of the plexus is connected with the superficial part of the cardiac plexus, and gives filaments to the left atrium, and to the anterior pulmonary plexus, and is then continued to form the greater part of the posterior coronary plexus. See also Sympathetic trunk Splanchnic nerves Autonomic nervous system References External links () Nerve plexus Nerves of the torso Heart