| 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 |
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 rami, white rami communicantes do not extend below L2 or above T1.[1]
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
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