A Technique for Collision Block of Peripheral Nerve: Frequency Dependence

A previously reported stimulation technique which elicits a unidirectionally propagated nerve action potential has been evaluated with repetition rates from 10 to 100 Hiz. Block of propagation in one direction from the stimulus site was sustained up to 50 Hz with monophasic stimulation and 30 Hz with biphasic stimulation. The use of long stimulating pulses produces pronounced degradation of the block at high frequencies.