Fig. 1.

Basic neuron circuitry of the cerebro-cerebellar loop. The region of the cerebellar cortex where we recorded neuron activities has strong loop connections with cortical motor areas. White terminals represent excitatory synapses, and black terminals represent inhibitory synapses. BC, basket cell; CF, climbing fiber; DN, dentate nucleus; GoC, Golgi cell; GrC, granule cell; IO, inferior olive; MF, mossy fiber; PC, Purkinje cell; PF, parallel fiber; PN, pontine nucleus; SC, stellate cell; Thal, thalamus.