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Axon numbers and distribution, myelin thickness, and the reconstruction of the compound action potential in the optic nerve of the teleost: Eugerres plumieri
Author(s) -
Tapp R. L.
Publication year - 1974
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.901530304
Subject(s) - axon , biology , myelin sheath , myelin , electrophysiology , compound muscle action potential , optic nerve , distribution (mathematics) , anatomy , neuroscience , biophysics , central nervous system , mathematics , mathematical analysis
The optic nerve of Eugerres plumieri contains about 200,000 fibers. Only 2.5% are non‐myelinated and the majority of these are grouped into a single tract. The axon diameters of the myelinated fibres range between 0.2 μ and 7.6 μ (mode, 0.7 μ) and the external fibre diameters range between 0.26 μ and 9.2 μ (mode, 1.0 μ). The relationship between myelin thickness, t, and axon diameter, d, shows a mode at about 0.25 (d/D = 0.67) but the distribution is wide and skewed positively. The compound action potential can be reconstructed arithmetically from morphological data and correlates well with electrophysiological recordings.