Organization of peripheral nerves and spinal roots of the Atlantic stingray, Dasyatis sabina

R. E. Coggeshall, R. B. Leonard, M. L. Applebaum, W. D. Willis

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The sizes and numbers of axons in peripheral nerves and spinal roots were investigated in the stingray, Dasyatis sabina. The axons of the dorsal and ventral roots do not mingle in peripheral nerves of this animal as they do in higher vertebrates. Thus, it was usually possible to split the peripheral nerve into two portions, one containing only dorsal root axons, the other containing only ventral root axons. This feature was useful for the analysis of certain aspects of spinal cord organization. The fact that dorsal and ventral root axons were segregated in peripheral nerves enables us to demonstrate, without experimental surgery, that the central processes of the dorsal root ganglion cells and the proximal ventral root axons were 10-20% narrower, on the average, than the distal processes of the same dorsal root ganglion cells or the distal parts of the same ventral root axons. The stingray is remarkable in having very few unmyelinated axons in the dorsal roots, ventral roots, or peripheral nerves. This paucity of unmyelinated axons distinguishes the Atlantic stingrays from all other vertebrates whose roots and nerves have been examined for unmyelinated fibers. Similar findings were obtained for one spotted eagle ray (Aetobatus narinari) and two cow-nose rays (Rhinoptera bonasus).

Original languageEnglish (US)
Pages (from-to)97-107
Number of pages11
JournalJournal of Neurophysiology
Volume41
Issue number1
StatePublished - 1978

Fingerprint

Spinal Nerve Roots
Peripheral Nerves
Axons
Spinal Ganglia
Vertebrates
Eagles
Nose
Spinal Cord

ASJC Scopus subject areas

  • Physiology
  • Neuroscience(all)

Cite this

Coggeshall, R. E., Leonard, R. B., Applebaum, M. L., & Willis, W. D. (1978). Organization of peripheral nerves and spinal roots of the Atlantic stingray, Dasyatis sabina. Journal of Neurophysiology, 41(1), 97-107.

Organization of peripheral nerves and spinal roots of the Atlantic stingray, Dasyatis sabina. / Coggeshall, R. E.; Leonard, R. B.; Applebaum, M. L.; Willis, W. D.

In: Journal of Neurophysiology, Vol. 41, No. 1, 1978, p. 97-107.

Research output: Contribution to journalArticle

Coggeshall, RE, Leonard, RB, Applebaum, ML & Willis, WD 1978, 'Organization of peripheral nerves and spinal roots of the Atlantic stingray, Dasyatis sabina', Journal of Neurophysiology, vol. 41, no. 1, pp. 97-107.
Coggeshall, R. E. ; Leonard, R. B. ; Applebaum, M. L. ; Willis, W. D. / Organization of peripheral nerves and spinal roots of the Atlantic stingray, Dasyatis sabina. In: Journal of Neurophysiology. 1978 ; Vol. 41, No. 1. pp. 97-107.
@article{54324a7691564e67ad4157d5304f7800,
title = "Organization of peripheral nerves and spinal roots of the Atlantic stingray, Dasyatis sabina",
abstract = "The sizes and numbers of axons in peripheral nerves and spinal roots were investigated in the stingray, Dasyatis sabina. The axons of the dorsal and ventral roots do not mingle in peripheral nerves of this animal as they do in higher vertebrates. Thus, it was usually possible to split the peripheral nerve into two portions, one containing only dorsal root axons, the other containing only ventral root axons. This feature was useful for the analysis of certain aspects of spinal cord organization. The fact that dorsal and ventral root axons were segregated in peripheral nerves enables us to demonstrate, without experimental surgery, that the central processes of the dorsal root ganglion cells and the proximal ventral root axons were 10-20{\%} narrower, on the average, than the distal processes of the same dorsal root ganglion cells or the distal parts of the same ventral root axons. The stingray is remarkable in having very few unmyelinated axons in the dorsal roots, ventral roots, or peripheral nerves. This paucity of unmyelinated axons distinguishes the Atlantic stingrays from all other vertebrates whose roots and nerves have been examined for unmyelinated fibers. Similar findings were obtained for one spotted eagle ray (Aetobatus narinari) and two cow-nose rays (Rhinoptera bonasus).",
author = "Coggeshall, {R. E.} and Leonard, {R. B.} and Applebaum, {M. L.} and Willis, {W. D.}",
year = "1978",
language = "English (US)",
volume = "41",
pages = "97--107",
journal = "Journal of Neurophysiology",
issn = "0022-3077",
publisher = "American Physiological Society",
number = "1",

}

TY - JOUR

T1 - Organization of peripheral nerves and spinal roots of the Atlantic stingray, Dasyatis sabina

AU - Coggeshall, R. E.

AU - Leonard, R. B.

AU - Applebaum, M. L.

AU - Willis, W. D.

PY - 1978

Y1 - 1978

N2 - The sizes and numbers of axons in peripheral nerves and spinal roots were investigated in the stingray, Dasyatis sabina. The axons of the dorsal and ventral roots do not mingle in peripheral nerves of this animal as they do in higher vertebrates. Thus, it was usually possible to split the peripheral nerve into two portions, one containing only dorsal root axons, the other containing only ventral root axons. This feature was useful for the analysis of certain aspects of spinal cord organization. The fact that dorsal and ventral root axons were segregated in peripheral nerves enables us to demonstrate, without experimental surgery, that the central processes of the dorsal root ganglion cells and the proximal ventral root axons were 10-20% narrower, on the average, than the distal processes of the same dorsal root ganglion cells or the distal parts of the same ventral root axons. The stingray is remarkable in having very few unmyelinated axons in the dorsal roots, ventral roots, or peripheral nerves. This paucity of unmyelinated axons distinguishes the Atlantic stingrays from all other vertebrates whose roots and nerves have been examined for unmyelinated fibers. Similar findings were obtained for one spotted eagle ray (Aetobatus narinari) and two cow-nose rays (Rhinoptera bonasus).

AB - The sizes and numbers of axons in peripheral nerves and spinal roots were investigated in the stingray, Dasyatis sabina. The axons of the dorsal and ventral roots do not mingle in peripheral nerves of this animal as they do in higher vertebrates. Thus, it was usually possible to split the peripheral nerve into two portions, one containing only dorsal root axons, the other containing only ventral root axons. This feature was useful for the analysis of certain aspects of spinal cord organization. The fact that dorsal and ventral root axons were segregated in peripheral nerves enables us to demonstrate, without experimental surgery, that the central processes of the dorsal root ganglion cells and the proximal ventral root axons were 10-20% narrower, on the average, than the distal processes of the same dorsal root ganglion cells or the distal parts of the same ventral root axons. The stingray is remarkable in having very few unmyelinated axons in the dorsal roots, ventral roots, or peripheral nerves. This paucity of unmyelinated axons distinguishes the Atlantic stingrays from all other vertebrates whose roots and nerves have been examined for unmyelinated fibers. Similar findings were obtained for one spotted eagle ray (Aetobatus narinari) and two cow-nose rays (Rhinoptera bonasus).

UR - http://www.scopus.com/inward/record.url?scp=0017855968&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0017855968&partnerID=8YFLogxK

M3 - Article

VL - 41

SP - 97

EP - 107

JO - Journal of Neurophysiology

JF - Journal of Neurophysiology

SN - 0022-3077

IS - 1

ER -