. Cunningham's Text-book of anatomy. Anatomy. SUPEEIOE CEEVICAL GANGLION. 757 2. Heart.—N. Cardiacus Superior.—The superior cardiac branch is a slender nerve which, on the right side, descends behind the large vessels into the thorax to join the deep cardiac plexus. On the left side the course of the nerve is similar in the neck, but in the superior mediastinum it passes between the left carotid and subclavian arteries, and over the aortic arch, to join with the inferior cervical cardiac branch of the vagus in the formation of the superficial cardiac plexus. In their course both nerves form co
. Cunningham's Text-book of anatomy. Anatomy. SUPEEIOE CEEVICAL GANGLION. 757 2. Heart.—N. Cardiacus Superior.—The superior cardiac branch is a slender nerve which, on the right side, descends behind the large vessels into the thorax to join the deep cardiac plexus. On the left side the course of the nerve is similar in the neck, but in the superior mediastinum it passes between the left carotid and subclavian arteries, and over the aortic arch, to join with the inferior cervical cardiac branch of the vagus in the formation of the superficial cardiac plexus. In their course both nerves form connexions with the other cardiac nerves of the sympathetic, and with cardiac and other branches of the vagus (recurrent and external laryngeal). 3. Vessels.—(a) The nn. carotici externi (external carotid branches) pass Internal carotid artery Cavernous plexus Internal carotid plexus / Pharyngeal branch of vagus / Glossopharyngeal nerve / / Stylopharyngeus Emergence of first cervical nerve Anterior ramus of first cervical Gray ramus communicans from superior cervical ganglion to first cervical nerve' Pharyngeal branches-- Superior cervical ganglion — Gray ramus communicans from superior cervical ganglion to second cervical nerve Anterior ramus of second cervical nerve* "x^'i Gray ramus communicans from superior cervical ganglion to third cervical nerve " Gray ramus communicans from superior cervical ganglion to fourth cervical nerve' Anterior ramus of third cervical nerve Anterior ramus of fourth cervical nerve- Anterior ramus of fifth cervical nerve _ Cardiac branches from cervical sympathetic--,—-„_ ___ ray ramicommunicantes from middle cervical fir J gaugliun to 5th and 6th cervical nerves Anterior ramus of 6th cervical nerve ^* ray rami communicantesfrom middle cervical _ A _ ganglion to 5th and 6th cervical nerves 1>Q^ Vertebral plexus-—* Anterior ramus of seventh cervical nerve--* —- Gray ramus communicans from inferior cervical ganglion to 7th
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