Timing of activity in cerebellar dentate nucleus and cerebral motor cortex during prompt volitional movement.

The discharge of neurons in cerebellar dentate nucleus and cerebral motor cortex was recorded on alternate days in each of 3 monkeys in association with prompt arm movement in response to a light signal. The time of change of the discharge of each neuron in relation to arm movement was computed. The distributions of the time of change for cerebellum and cerebrum overlapped, but the cerebellar distribution was shifted slightly earlier.