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Differences between the time constant of sensory and motor peripheral nerve fibers: Further studies and considerations by Marcela Panizza; Jan Nilsson; Bradley J. Roth; Stephen E. Grill; Mehmet Demirci; Mark Hallett is a Medicine article available to read on EtoBox.

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Using a method of latent addition, we previously demonstrated that sensory fibers had time constants that were about three times longer than those of motor fibers. The aim of the present work was to confirm this difference by determining the time constants for single sensory axons by using microneurography and for single motor axons by recording single motor units with bipolar concentric needle electrodes. To determine the influence of the conditioning pulse on the neural time constant, we used both depolarizing and hyperpolarizing conditioning pulses. When hyperpolarizing conditioning pulses at comparable intensity were applied, the tendency was to find shorter time constants than when depolarizing pulses were applied, although still with the motor time constant being slightly shorter. Although the absolute values varied with the different methods, the sensory time constant was generally three times the motor time constant for depolarizing conditioning stimuli, whereas for hyperpolarizing conditioning stimuli the difference dropped to about one and a half. These characteristics improve understanding of the behavior of sensory and motor axons, and, in particular, explain the differ

Who reads Differences between the time constant of sensory and motor peripheral nerve fibers: Further studies and considerations?

Author

Marcela Panizza; Jan Nilsson; Bradley J. Roth; Stephen E. Grill; Mehmet Demirci; Mark Hallett

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0148-639X)

Published

1998

Language

EN

Field

Medicine (Health Sciences)