Correlation of cell body size, axon size, and signal conduction velocity for individually labelled dorsal root ganglion cells in the cat.

摘要: Measurements of cell body and peripheral central axon sizes were made for primary sensory neurons outlined by the intracellular injection HRP. Conduction velocities also measured on processes. The then subdivided into A C cells basis conduction velocity impulses carried processes these cells. Central both are smaller than processes, but size differential is greater For there a linear relation between axons, confidence limits wide. process two aberrant resulted in no correlation velocity. cells, linearly correlated with size. By contrast such correlations can be demonstrated This presumably implies an important difference that impulse not widely accepted generalization large give rise to myelinated axons small unmyelinated axons. In this study, defined those clearly (greater 50 microns diameter), their always 2.5 m/s, (less 35 less m/s. Thus above holds. intermediate-sized (35-50 microns), however, bears predictable thus whether or unmyelinated. does hold intermediate group since many range, we feel oversimplification.