Identifier: 66240130R.nlm.nih.gov
Title: Outlines of the nerves : with short descriptions : designed for the use of medical students
Year: 1852 (1850s)
Authors: Neill, John, 1819-1880
Subjects: Nervous System
Publisher: Philadelphia : Barrington and Haswell
Contributing Library: U.S. National Library of Medicine
Digitizing Sponsor: Open Knowledge Commons, U.S. National Library of Medicine

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Mesenteric, Renal, andInferior .Mesenteric Arteries. HYPO GASTRIC PLEXUS, PLATE VI. Is situated in the lower part of the pelvis, and is formed by fila-ments from the Lumbar ganglions, through the Inferior Mesen-teric Plexus, and by means of filaments from the Sacral gan-glions, which are usually three in number. This plexus is dis-tributed upon the rectum and bladder, organs of generation,&c. The last Sacral ganglion, called azygos or impar, is situ-ated in front of the coccyx, and terminates the sympatheticnerve. SPINAL NERVES. These are usually thirty in number, and are divided into 1 sub-occipi-tal, 7 cervical, 12 dorsal, 5 lumbar, and 5 sacral. Each arisesby two roots from the spinal marrow, which unite in the inter-vertebral foramen. Before their union, an oval ganglion isformed upon the posterior and larger root. After their unionthey divide into posterior and anterior trunks. (Plate VII.Fig. 2.) The sacral ganglions are in the spinal canal. Serves />/ 7 Fy. /
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&0*QV >K< - St Trunk Ant^ <.• Ant Trurl Section of Spinal marrow ^ i PS Dui:.r, I TIIF. NERVES. 23 SUB-OCCIPITAL X E H V E . — This nerve is exceedingly small, andgenerally arises by a single root from the spinal marrow. Itpasses out of the vertebral cavity between the occiput and theatlas, and supplies the muscles on the back of the neck andhead. (Plate VI.; and Plate IV., Fig. 1.) THREE SUPERIOR CERVICAL NERVES.—After escaping throughthe intervertebral foramina, they divide into anterior and pos-terior trunks. The posterior trunks are spent upon the musclesupon the back of the spinal column. The anterior trunks forma Plexus, branches from which supply the muscles of the neck ;and cutaneous branches are distributed to the integuments.The Great Auricular branch passes behind the ear. PHRENIC NERVE. — This nerve is formed from the second andthird cervical, descends upon the front of the scalenus amicusmuscle, and then enters the thorax through the superior medi-ast

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