[Segmental reciprocal reflexes of the thoracic region of the spinal cord].

Under conditions of routine experiment stimulation of the central cut end of the intercostal nerve evoked reflex discharges simultaneously in several intercostal nerves of the same and contralateral side of the thorax. No reciprocity in these reflexes was noted. In the present experiments it was shown (that in unanesthetised spinal cats the reflex discharges in the intercostal nerves were facilitated by the mechanical stimulation of the ipsilateral parietal pleura and were inhibited by the same kind of stimulation of the contralateral pleura. Thus, the existence of the reciprocal segmental reflexes between the left and the right sides of the thorax was established for the first time.