[Reflex changes in the function of the cerebral cortex and central gray matter after electroacupuncture].

It was shown in acute experiments on cats exposed to single stimulation of different areas of the large hemispheric cortex that the second somatosensory zone (SP) has the most marked corticofugal connections with the central gray matter (CG). Electroacupuncture stimulation (EAS) in the area of the cat auricular basis (1.2 ms, up to 16 mA, 1-3 pulse/sec, 15-30 min) inhibited the evoked nociceptive responses in the P and facilitated them in the CG. The non-nociceptive evoked responses were facilitated by EAS both in the SP and CG. Upon SP cooling EAS did not facilitate the evoked non-nociceptive responses in the CG. It is suggested that the SP may play an important part in the activation of one of the main antinociceptive structures of the CG under EAS.