Dynamic-static sensitivity of rat chorda tympani fibers to anodal current applied to the tongue.

Responses of rat single chorda tympani fibers to anodal current of varying rise rates and current intensities applied to the tongue were examined. Thirteen out of fifteen chorda tympani fibers were sensitive to both rate of current rise and current intensity. However, sensitivities to these two stimulus parameters were different among 13 fibers. The remaining two fibers were not sensitive to the rate of current rise, but sensitive to current intensity. It was suggested that sensitivity to the rate of current rise was independent from that to current intensity.