Splanchnic preganglionic neurons in man. III. Morphometry of Myelinated Fibers of Rami Communicantes

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The myelinated fiber (MF) composition of T6-T8 rami communicantes was obtained in 9 healthy persons of various ages. The textbook picture that distal rami (DR) contain all of the myelinated fibers and therefore are white, while proximal rami (PR) contain none of them and therefore are grey must be modified. The authors found that DR usually contained abundant MFs and that PR contained variable numbers of MFs, sometimes as many as DR. A close enough concordance was found between segmental numbers of intermediolateral nuclei cytons, ventral root small myelinated fibers (SMFs), and rami total small MFs to suggest that both rami probably contain the distal myelinated axons of pre-ganglionic autonomic fibers. Finally, there was an attrition of total MFs of rami with age, similar to that previously found for intermediolateral cytons and for root SMFs. The decrease in number of pre-ganglionic autonomic neurons with age is thought to be of sufficient magnitude to account for the dysautonomia of the elderly.

Original languageEnglish (US)
Pages (from-to)734-740
Number of pages7
JournalJournal of Neuropathology and Experimental Neurology
Volume37
Issue number6
StatePublished - 1978

Fingerprint

Primary Dysautonomias
Viscera
Textbooks
Spinal Nerve Roots
Axons
Neurons
Spinal Cord Lateral Horn

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Neuroscience(all)

Cite this

@article{3e81d2581ef040e78f73db7b512fa6d1,
title = "Splanchnic preganglionic neurons in man. III. Morphometry of Myelinated Fibers of Rami Communicantes",
abstract = "The myelinated fiber (MF) composition of T6-T8 rami communicantes was obtained in 9 healthy persons of various ages. The textbook picture that distal rami (DR) contain all of the myelinated fibers and therefore are white, while proximal rami (PR) contain none of them and therefore are grey must be modified. The authors found that DR usually contained abundant MFs and that PR contained variable numbers of MFs, sometimes as many as DR. A close enough concordance was found between segmental numbers of intermediolateral nuclei cytons, ventral root small myelinated fibers (SMFs), and rami total small MFs to suggest that both rami probably contain the distal myelinated axons of pre-ganglionic autonomic fibers. Finally, there was an attrition of total MFs of rami with age, similar to that previously found for intermediolateral cytons and for root SMFs. The decrease in number of pre-ganglionic autonomic neurons with age is thought to be of sufficient magnitude to account for the dysautonomia of the elderly.",
author = "Low, {Phillip Anson} and Dyck, {Peter J}",
year = "1978",
language = "English (US)",
volume = "37",
pages = "734--740",
journal = "American Journal of Psychotherapy",
issn = "0002-9564",
publisher = "Lippincott Williams and Wilkins",
number = "6",

}

TY - JOUR

T1 - Splanchnic preganglionic neurons in man. III. Morphometry of Myelinated Fibers of Rami Communicantes

AU - Low, Phillip Anson

AU - Dyck, Peter J

PY - 1978

Y1 - 1978

N2 - The myelinated fiber (MF) composition of T6-T8 rami communicantes was obtained in 9 healthy persons of various ages. The textbook picture that distal rami (DR) contain all of the myelinated fibers and therefore are white, while proximal rami (PR) contain none of them and therefore are grey must be modified. The authors found that DR usually contained abundant MFs and that PR contained variable numbers of MFs, sometimes as many as DR. A close enough concordance was found between segmental numbers of intermediolateral nuclei cytons, ventral root small myelinated fibers (SMFs), and rami total small MFs to suggest that both rami probably contain the distal myelinated axons of pre-ganglionic autonomic fibers. Finally, there was an attrition of total MFs of rami with age, similar to that previously found for intermediolateral cytons and for root SMFs. The decrease in number of pre-ganglionic autonomic neurons with age is thought to be of sufficient magnitude to account for the dysautonomia of the elderly.

AB - The myelinated fiber (MF) composition of T6-T8 rami communicantes was obtained in 9 healthy persons of various ages. The textbook picture that distal rami (DR) contain all of the myelinated fibers and therefore are white, while proximal rami (PR) contain none of them and therefore are grey must be modified. The authors found that DR usually contained abundant MFs and that PR contained variable numbers of MFs, sometimes as many as DR. A close enough concordance was found between segmental numbers of intermediolateral nuclei cytons, ventral root small myelinated fibers (SMFs), and rami total small MFs to suggest that both rami probably contain the distal myelinated axons of pre-ganglionic autonomic fibers. Finally, there was an attrition of total MFs of rami with age, similar to that previously found for intermediolateral cytons and for root SMFs. The decrease in number of pre-ganglionic autonomic neurons with age is thought to be of sufficient magnitude to account for the dysautonomia of the elderly.

UR - http://www.scopus.com/inward/record.url?scp=0018216101&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0018216101&partnerID=8YFLogxK

M3 - Article

C2 - 739274

AN - SCOPUS:0018216101

VL - 37

SP - 734

EP - 740

JO - American Journal of Psychotherapy

JF - American Journal of Psychotherapy

SN - 0002-9564

IS - 6

ER -