VOUS SYSTEM). The anterior primary division runs round the trunk, between the ANrcRioi ribs, forming an ekovvN intercostal nerve and giving off a From A. M. Paterson, in Cunningham's Text-Book of Anatomy. lateral cutaneous FIG. 5.-Scheme of the Distribution of a branch, when the Typical Spinal Nerve. side of the body is reached, which divides into anterior and posterior secondary branches. The rest of the division runs forward, supplying the intercostal muscles, as far as the edge of the sternum, when it ends in an anterior cutaneous branch to the front of the chest. The dorsal primary division divides into an external (lateral) and internal From A. M. Paterson, in Cunningham's Text-Book of Anatomy. Va.R, Right vagi. Va.L, Left vagi. r, Ganglion of the root and connexions with Sy, Sympathetic, superior cervical ganglion. G.Ph, Glosso-pharyngeal. Acc, Spinal accessory nerve. m, Meningeal branch. Aur, Auricular branch. Ganglion of the trunk and connexions with Hy, Hypoglossal nerve. CI , C2 Loop • between the first two cervical nerves. Sy, Sympathetic. A cc, Spinal accessory nerve. Ph, Pharyngeal branch. Ph.Pl, Pharyngeal plexus. .S.L, Superior laryngeal nerve. I.L, Internal laryngeal branch. E.L, External laryngeal branch. I.C, InternaI, and E. C, External carotid arteries. Cal, Superior cervical cardiac branch. [branch. Cat, Inferior cervical cardiac R.L, Recurrent laryngeal nerve. Ca3, Cardiac branches from recurrent laryngeal nerves. Ca4, Thoracic cardiac branch (right vagus). A.P.PI, Anterior, and P.P.Pl, Posterior pulmonary plexuses. Oes.Pl, Oesophageal plexus. Gast.R, and Gasl.L. Gastric branches of vagus (right and left). Coe.Pl, Coeliac plexus. Hep.Pl, Hepatic plexus. Spl.Pl, Splenic plexus. Ren.Pl, Renal plexus. /NT£RNAL BR NCe/