Copyright © Philip M. Parker, INSEAD. Terms of Use.

Spinal Nerve

Definition: Spinal Nerve

Spinal Nerve

Noun

1. Any of the 31 pairs of nerves emerging from each side of the spinal cord (each attached to the cord by two roots: ventral and dorsal).

Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.
 


Synonym: Spinal Nerve

Synonym: nervus spinalis (n). (additional references)

Top     

Specialty Definition: Spinal nerve

(From Wikipedia, the free Encyclopedia)

The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. The spinal nerve is the bit that passes out of the vertebrae through the intervertebral foramen.


The formation of the spinal nerve from the dorsal and ventral roots.

Formation of the spinal nerves

Inside the spinal cord, there is grey matter, surrounded by white matter. From out of the grey matter, two dorsal roots (one on the left side, and one on the right side) and two ventral roots emerge. The dorsal roots contain motor axons, and the ventral roots contain sensory axons.

Dorsal means back, ventral means front. As the body is symmetrical, the same thing happens on both the left and right side of the body. This happens in each vertebra of the spine.

The dorsal roots of each side continue outwards, along the way forming a dorsal root ganglion (also called a spinal ganglion).

The ventral roots similarly continue out from the spinal column, and meet and mix with their corresponding dorsal nerve root at a point after the ganglion. At this point they are called a mixed spinal nerve.

Fate of the spinal nerve

Soon after their formation, from the each of the spinal nerves, a dorsal and a ventral ramus emerge. The dorsal ramus will supply muscles and sensory nerves of the back.

To make terminology more confusing, the ventral rami are called roots of the various nervous plexuses (e.g. brachial plexus). From the plexuses (or plexi) arise the sensory and motor nerves of the limbs.

Before forming the plexuses, the ventral rami also have two branches leading to the sympathetic ganglion. (These ganglia connect to the one above and below them, forming the sympathetic chain.)

Importance of the spinal nerves

The muscles that one particular spinal root supplies are that nerve´s myotome, and the dermatomes are the areas of sensory innervation on the skin for each spinal nerve. This is of great importance in the diagnosis of neurological disorders, as lesions of one or more nerve roots result in typical patterns of neurologic defects (muscle weakness, loss of sensation) that allow localisation of the causating lesion.

Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Spinal nerve."

Top     

Crosswords: Spinal Nerve

English words defined with "spinal nerve": cervical disc syndrome, cervical root syndrome ♦ myelogram ♦ rhizotomy ♦ Werdnig-Hoffman disease. (references)
Specialty definitions using "spinal nerve": Polyradiculoneuropathy, Polyradiculopathy ♦ Spinal Nerves. (references)

Top     

Image Slideshow: Spinal Nerve

Illustrations:
Spinal Nerve

More pictures...

Top     

Non-Fiction Usage: Spinal Nerve

SubjectTopicQuote

Health

In contrast, herpes simplex, which causes recurrent infections of cold sores and fever blisters, has been identified in spinal nerve cells during its latent periods. (references)

Source: compiled by the editor from ICON Group International, Inc.; see credits.

Top     

Expression: Spinal Nerve

Expression using "spinal nerve": Spinal Nerve Roots. Additional references.

Source: compiled by the editor from various references; see credits.

Top     

Frequency of Internet Keywords: Spinal Nerve

The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com.
 
ExpressionFrequency
per Day

spinal nerve root

4
Source: compiled by the editor from various references; see credits.

Top     

Modern Translation: Spinal Nerve

Language Translations for "spinal nerve"; alternative meanings/domain in parentheses.

Danish

  

spinalnerveplexer (spinal nerve plexuses). (various references)

   

French

  

nerf rachidien. (various references)

   

German

  

Plexus nervorum spinalium (spinal nerve plexuses). (various references)

   

Greek 

  

πλέγματα των νωτιαίων νεύρων (spinal nerve plexuses). (various references)

   

Italian

  

plessi nervosi spinali (spinal nerve plexuses). (various references)

   

Pig Latin

  

inalspay ervenay

   

Portuguese

  

plexo dos nervos raquidianos (spinal nerve plexuses). (various references)

   

Spanish

  

plexo de los nervios raquídeos (spinal nerve plexuses). (various references)

   

Turkish

  

omurilik siniri, belkemiği siniri. (various references)

Source: compiled by the editor from various translation references.

Top     

Anagrams: Spinal Nerve

Scrabble® Enable2K-Verified Anagrams

Words within the letters "a-e-e-i-l-n-n-p-r-s-v"

-1 letter: perennials.

-2 letters: perennial, replevins.

-3 letters: alieners, anserine, enlivens, enplanes, enslaver, espalier, innerves, liveners, naperies, nervines, panniers, penalise, perineal, pilsener, planners, pralines, prelives, prevails, ravelins, repanels, replevin, sepaline, sniveler, vesperal.

-4 letters: alevins, aliener, aliners, alpines, aperies, elapine, enliven, enplane, enslave, ensnare, ensnarl, enviers, erepsin, innerve, insaner, insnare, inverse, lanners, laveers, leaners, leapers, leavens, leavers, leavier.

 Words containing the letters "a-e-e-i-l-n-n-p-r-s-v"
 

+3 letters: convertiplanes.

Source: compiled by the editor from various references; see credits.

SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.

Top     



INDEX

1. Definition
2. Synonyms
3. Crosswords
4. Images: Slideshow 		5. Quotations: Non-fiction
6. Expressions
7. Expressions: Internet
8. Translations: Modern 		9. Anagrams
10. Bibliography


  

Copyright © Philip M. Parker, INSEAD. Terms of Use.