Effects of low frequency stimulation on the monosynaptic reflex (H reflex) in man

Abstract

The effects of repetitive activation on fhe electrically induced and recorded monosynaptic reflex (H reflex) were studied in 10 normal adults. An incremental increase in the frequency of stimulation from 3/min. to 4/sec. was associated with a progressive reduction in the amplitude of the reflex. The depression of the H reflex developed rapidly after the onset of each series and the magnitude of the depression was inversely related to the intensity of stimulation. These findings were discussed in light of the previously established effects of low frequency stimulation on monosynaptic reflex transmission in the cat.