[Effect of the vibrostimulation frequency on skin mechanoreceptors innervated with Abeta-, Adelta- and C-fibers].

Vibrational stimulation of cat's skin by the frequencies of 10, 30 and 50 per second evoked response of mechanoreceptors innervated with A beta and A delta-fibers, responding to each vibration stimulus. The higher vibrostimulation frequency, the more distinct changes appear in the "on"--and "off"--responses which are caused by a decreasing number of pulses for each vibration impact. The mechanoreceptors innervated with the C-fibers are not excited by these frequencies. After a preliminary vibrostimulation the part of mechanoreceptors innervated with C-fibers do not respond to the mechanical stimulus tested. The higher the frequency of preliminary vibrostimulation, the fewer receptors respond to the tested stimulus.