Autonomic response to chronic electrode stimulation of cerebellum

¹ Department of Physiology, University of Alabama Medical Center, Birmingham, Alabama

The cerebellum was stimulated with implanted chronic concentric stainless steel electrodes in ten cats, with isolation of current to the cortex immediately beneath the electrodes. Stimulus parameters were: current density 0.5–2.55 ma/mm², pulse duration 1–2 msec., frequency 100 cycle/sec, stimulus train duration 10–15 sec. Elevation of bladder pressure, pupillary dilatation, and pupillary constriction were obtained at P values of 10^–7–10^–10; depression of bladder pressure at P < 10^–5. Responsive areas included ansiform lobule and vermis.