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In [[vertebrata|vertebratis]] '''nervus spinalis''' <ref name="FCAT">Federative Committee on Anatomical Terminology (1998). ''Terminologia Anatomica''. Stutgardiae: Thieme</ref> ([[Terminologia Anatomica|FCAT]]: A08.800.800.720) est [[systema nervosum periphericum|systematis nervosi peripherici]] [[nervus]], cuius corpori humano pariter triginta et unus sunt<ref>[https://meshb.nlm.nih.gov/record/ui?name=Spinal%20nerves Referentia nervorum spinalium.]</ref>, octo enim (C<sub>1</sub>-C<sub>8</sub>) cervicales, duodecim (Th<sub>1</sub>-Th<sub>12</sub>) thoracales, lumbales quinque (L<sub>1</sub>-L<sub>5</sub>), sacrales quinque (S<sub>1</sub>-S<sub>5</sub>), unus coccygeales (Cc<sub>1</sub>).
 
Quisque nervus ex duobus ramis vel ''radicibus'', ventrali enim et dorsali, ex [[medulla spinalis|medulla spinali]] oritur. Radice ventrali nervi efferentes - de medulla exorti - fluunt, radice autem dorsali nervi afferentes in medullam. Perykarya nervorum afferentium in [[ganglion sensorium nervi spinalis|ganglione sensorium]] radicem dorsalem leviter in decursus medio tumefaciunt. Ramificatione inter quattuor typos fibrorum[[fibra nervorumnervosa|fibrarum nervosarum]] [[systema nervosum centrale]] cum (periphericis) [[systema nervosum somaticum|systemate nervoso somatico]] et [[systema nervosum autonomicum|systema nervoso autonomico]] communicat.
 
[[Fasciculus:Gray799.svg|thumb|300px|Structura nervorum spinalium<br>1. Nervus efferens somaticus.<br>2. Nervus afferens somaticus.<br>3,4,5. Nervus efferens visceralis (autonomicus).<br>6,7. Nervus afferens visceralis (autonomicus)]]
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