منابع مشابه
A computational study of the impact of inhomogeneous internodal lengths on conduction velocity in myelinated neurons
Age-related decreases in the conduction velocity (CV) of action potentials along myelinated axons have been linked to morphological changes in the myelin sheath. In particular, evidence suggests the presence of segmental demyelination and remyelination of axons. In remyelinated segments, the distance between adjacent nodes of Ranvier is typically shorter, and myelin sheaths are thinner. Both ex...
متن کاملEffect of limb lengthening on internodal length and conduction velocity of peripheral nerve.
The influences of axon diameter, myelin thickness, and internodal length on the velocity of conduction of peripheral nerve action potentials are unclear. Previous studies have demonstrated a strong dependence of conduction velocity on internodal length. However, a theoretical analysis has suggested that this relationship may be lost above a nodal separation of ∼0.6 mm. Here we measured nerve co...
متن کاملIncreasing Internodal Distance in Myelinated Nerves Accelerates Nerve Conduction to a Flat Maximum
Predictions that conduction velocities are sensitive to the distance between nodes of Ranvier in myelinated axons have implications for nervous system function during growth and repair. Internodal lengths defined by Schwann cells in hindlimb nerves, for example, can undergo a 4-fold increase during mouse development, and regenerated nerves have internodes that are uniformly short. Nevertheless,...
متن کاملOn the Relation between the Conduction-rate, the Fibre-diameter and the Internodal Distance of the Medullated Nerve Fibre
Since Gasser and Erlanger (3, 4) published their extensive experiments on the relationship between the conduction-rate and the diameter of the nerve fibre, there has been a large amount of work concerning this problem (Blair and Erlanger, 2; Zotter man, 15; Pumphrey and Young, 9; Hursh, 7; Gasser and Grundfest, 6 etc.). The method adopted by these investigators, except for Pumphrey and Young wh...
متن کاملFactors affecting electrical impedance of internodal stem sections.
A sample holder was designed and built to facilitate measuring the magnitude and phase angle of the electrical impedance of internodal stem sections from Cornus stolonifera Michx. A nonpolarizing, electrically conducting manganese dioxidecarbon paste used between the stem sample and the electrodes of the sample holder allowed measurement of impedance at frequencies from 50 hertz to 500 kilohert...
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 1975
ISSN: 0022-5223
DOI: 10.1016/s0022-5223(19)41543-2