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Quantitative relationships between nerve and satellite cells in spinal ganglia: An electron microscopical study. II. Reptiles
Author(s) -
Pannese Ennio,
Ventura Raoul,
Bianchi Rossella
Publication year - 1975
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901600404
Subject(s) - biology , gecko , poikilotherm , anatomy , lizard , nerve cells , cell bodies , neuroscience , nervous system , central nervous system , zoology , ecology , microbiology and biotechnology
Abstract In the spinal ganglia of two species of reptiles (gecko and lizard) the volume of the perikaryal satellite cell sheath was found directly proportional both to the volume and surface area of the related neuronal body. This result agrees with that obtained in a previous research on two species of mammals (cat and rabbit). A quantitative balance between neuronal bodies and their associated glial tissue therefore exists also in the spinal ganglia of zoological species phylogenetically quite distant from mammals. The quantitative relationship between glial and nerve tissue was found to be lower in the gecko and lizard than in the cat and rabbit. This difference could have a phylogenetic significance, and/or it could be explained by the lower metabolic rate in the nervous system of the poikilotherms in respect to mammals.