Characteristics of the spino-bulbo-spinal reflex with evoked EMGs in human subjects.

Training in sports medicine and rehabilitation medicine requires the establishment of conditioned reflexes. Reinforcement of a conditioned reflex is more effective when it is part of a set of two or three reflexes. The late spinal reflexes appearing after conditioning were resolved into a stretch reflex and a spino-bulbo-spinal (SBS) reflex. H and M waves on the tibialis anterior muscle induced by tibial nerve stimulation were determined from the escape potential of the triceps sural muscle contraction. The tibial nerve and peroneal nerve were stimulated bilaterally, and H and M waves from the triceps sural muscle and tibialis anterior muscle were recorded bilaterally. The complete separation method of the late response and the time course of the stretch reflex and SBS reflex that composed the late response are described in this paper.