Cortical seizures following cerebellar stimulation in primates

The effects of cerebellar stimulation were studied in monkeys with chronic alumina-cream epileptogenic foci in motor cortex. Low-frequency stimulation (5–15 c/sec) was ineffective in altering spontaneous cortical spiking. Clinical and electrographic seizures were elicited following high-frequency cerebellar stimulation (100 c/sec). This was a consistent finding following cerebellar stimulation, although no spontaneous seizures had been seen in these animals. These studies suggest the existence of facilitatory cerebellar mechanisms and indicate the need for further studies in chronic animal models.