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White ramus communicans
Scheme showing structure of a typical spinal nerve. 1. Somatic efferent. 2. Somatic afferent. 3,4,5. Sympathetic efferent. 6,7. Sympathetic afferent.
Latin	rami communicantes albi
Gray's	subject #208 920
System
MeSH	[1]
Diagram of the course and branches of a typical intercostal nerve. (Rami communicantes labeled at center.)

The thoracic, and the first and second lumbar nerves each contribute a branch, white ramus communicans to the adjoining sympathetic ganglion.

They contain myelinated preganglionic sympathetic fibers (GVE and GVA).

[edit] Additional images

Deep and superficial dissection of the lumbar plexus.

Thoracic portion of the sympathetic trunk.

[edit] See also

• Gray ramus communicans

[edit] External links

• Dictionary at eMedicine white+rami+communicantes
• Atlas of anatomy at UMich n3a6p1 - "Autonomic Connections of the Spinal Cord"
• Overview and diagram

tl:White ramus communicans

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

This box: view • talk • edit Nerves - autonomic nervous system

sympathetic nervous system and parasympathetic nervous system HEAD/parasympathetic ganglion: ciliary ganglion (short ciliary nerves) - pterygopalatine ganglion (nerve of pterygoid canal) - submandibular ganglion - otic ganglion NECK: cavernous plexus - cervical ganglia: (superior, middle, inferior), stellate ganglion, internal carotid THORAX: thoracic splanchnic nerves, cardiac plexus, superior cardiac nerve, middle cardiac nerve, inferior cardiac nerve sympathetic trunks (white ramus communicans, gray ramus communicans) - collateral ganglia - sympathetic ganglion ABDOMEN: inferior mesenteric - hepatic - splenic - gastric - pancreatic - suprarenal hypogastric: superior hypogastric - inferior hypogastric - vesical - prostatic - uterovaginal, lumbar splanchnic, sacral splanchnic, celiac: celiac ganglia - aorticorenal - renal - spermatic/ovarian - superior mesenteric - aortic plexus Enteric nervous system: Meissner's plexus • Auerbach's plexus PELVIS: ganglion impar, pelvic splanchnic

Spinal cord

epidural space, dura mater, subdural space, arachnoid mater, subarachnoid space, pia mater, denticulate ligaments, conus medullaris, cauda equina, filum terminale, cervical enlargement, lumbar enlargement, anterior median fissure, dorsal root, dorsal root ganglion, dorsal ramus, ventral root, ventral ramus, sympathetic trunk, gray ramus communicans, white ramus communicans grey matter: central canal, substantia gelatinosa of Rolando, reticular formation, substantia gelatinosa centralis, interneuron, anterior horn, lateral horn, posterior horn (column of Clarke, dorsal spinocerebellar tract) white matter: anterior funiculus: descending (anterior corticospinal tract, vestibulospinal fasciculus, tectospinal tract), ascending (anterior spinothalamic tract, anterior proper fasciculus) lateral funiculus: descending (lateral corticospinal tract, rubrospinal tract, olivospinal tract), ascending dorsal spinocerebellar tract, ventral spinocerebellar tract, spinothalamic tract, lateral spinothalamic tract, anterior spinothalamic tract, spinotectal tract, posterolateral tract, lateral proper fasciculus, medial longitudinal fasciculus posterior funiculus: fasciculus gracilis, fasciculus cuneatus, posterior proper fasciculus

This page uses content from the English-language version of Wikipedia. The original article was at White ramus communicans. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.