White ramus communicans

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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.
Diagram of the course and branches of a typical intercostal nerve. (Rami communicantes labeled at center.)
Latin ramus communicans albus nervi spinalis
Gray's subject #208 920
Dorlands/Elsevier r_02/12689486

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).

Unlike the gray variety, white rami communicantes do not extend below L3.[1]

Additional images


  1. "Dissector Answers - Kidney & Retroperitoneum". Retrieved 2007-11-13.

See also

External links

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 As such, some of the information contained herein may be outdated.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.