Electrophysiological evidence for the presence of looping myelinated afferent fibers in the rat ventral root

Eun Joo Baik-Han, Kwang Jin Kim, Jin Chung

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We obtained neurophysiological evidence for the existence of looping fibers in the rat ventral root. In anesthetized rats, simultaneous recordings of spontaneous activity were made from the lumbar ventral root with two pairs of bipolar recording electrodes. In 6 ventral roots, single unit activity appeared as pairs of spikes with opposite polarity in both the distal and proximal recording electrodes. The timing and polarity of the spikes can only be logically explained by supposing that they are simultaneous recordings from two pairs of electrodes of two action potentials traveling opposite directions in a single myelinated fiber. This explanation was reinforced by recording the activity after sectioning various parts of the ventral root. These data suggest that there are spontaneously active ventral root myelinated fibers that enter the root and then loop back out toward the dorsal root ganglion.

Original languageEnglish (US)
Pages (from-to)65-70
Number of pages6
JournalNeuroscience Letters
Volume104
Issue number1-2
DOIs
StatePublished - Sep 25 1989

Fingerprint

Spinal Nerve Roots
Electrodes
Spinal Ganglia
Action Potentials

Keywords

  • Looping fiber
  • Single unit activity
  • Spontaneous activity
  • Ventral root afferent

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Electrophysiological evidence for the presence of looping myelinated afferent fibers in the rat ventral root. / Baik-Han, Eun Joo; Kim, Kwang Jin; Chung, Jin.

In: Neuroscience Letters, Vol. 104, No. 1-2, 25.09.1989, p. 65-70.

Research output: Contribution to journalArticle

@article{b95967b77e8e4230b02d35a4fecffa7e,
title = "Electrophysiological evidence for the presence of looping myelinated afferent fibers in the rat ventral root",
abstract = "We obtained neurophysiological evidence for the existence of looping fibers in the rat ventral root. In anesthetized rats, simultaneous recordings of spontaneous activity were made from the lumbar ventral root with two pairs of bipolar recording electrodes. In 6 ventral roots, single unit activity appeared as pairs of spikes with opposite polarity in both the distal and proximal recording electrodes. The timing and polarity of the spikes can only be logically explained by supposing that they are simultaneous recordings from two pairs of electrodes of two action potentials traveling opposite directions in a single myelinated fiber. This explanation was reinforced by recording the activity after sectioning various parts of the ventral root. These data suggest that there are spontaneously active ventral root myelinated fibers that enter the root and then loop back out toward the dorsal root ganglion.",
keywords = "Looping fiber, Single unit activity, Spontaneous activity, Ventral root afferent",
author = "Baik-Han, {Eun Joo} and Kim, {Kwang Jin} and Jin Chung",
year = "1989",
month = "9",
day = "25",
doi = "10.1016/0304-3940(89)90330-3",
language = "English (US)",
volume = "104",
pages = "65--70",
journal = "Neuroscience Letters",
issn = "0304-3940",
publisher = "Elsevier Ireland Ltd",
number = "1-2",

}

TY - JOUR

T1 - Electrophysiological evidence for the presence of looping myelinated afferent fibers in the rat ventral root

AU - Baik-Han, Eun Joo

AU - Kim, Kwang Jin

AU - Chung, Jin

PY - 1989/9/25

Y1 - 1989/9/25

N2 - We obtained neurophysiological evidence for the existence of looping fibers in the rat ventral root. In anesthetized rats, simultaneous recordings of spontaneous activity were made from the lumbar ventral root with two pairs of bipolar recording electrodes. In 6 ventral roots, single unit activity appeared as pairs of spikes with opposite polarity in both the distal and proximal recording electrodes. The timing and polarity of the spikes can only be logically explained by supposing that they are simultaneous recordings from two pairs of electrodes of two action potentials traveling opposite directions in a single myelinated fiber. This explanation was reinforced by recording the activity after sectioning various parts of the ventral root. These data suggest that there are spontaneously active ventral root myelinated fibers that enter the root and then loop back out toward the dorsal root ganglion.

AB - We obtained neurophysiological evidence for the existence of looping fibers in the rat ventral root. In anesthetized rats, simultaneous recordings of spontaneous activity were made from the lumbar ventral root with two pairs of bipolar recording electrodes. In 6 ventral roots, single unit activity appeared as pairs of spikes with opposite polarity in both the distal and proximal recording electrodes. The timing and polarity of the spikes can only be logically explained by supposing that they are simultaneous recordings from two pairs of electrodes of two action potentials traveling opposite directions in a single myelinated fiber. This explanation was reinforced by recording the activity after sectioning various parts of the ventral root. These data suggest that there are spontaneously active ventral root myelinated fibers that enter the root and then loop back out toward the dorsal root ganglion.

KW - Looping fiber

KW - Single unit activity

KW - Spontaneous activity

KW - Ventral root afferent

UR - http://www.scopus.com/inward/record.url?scp=0024343819&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024343819&partnerID=8YFLogxK

U2 - 10.1016/0304-3940(89)90330-3

DO - 10.1016/0304-3940(89)90330-3

M3 - Article

C2 - 2812537

AN - SCOPUS:0024343819

VL - 104

SP - 65

EP - 70

JO - Neuroscience Letters

JF - Neuroscience Letters

SN - 0304-3940

IS - 1-2

ER -