Circuitry Folia Climbing fibs. Mossy fibs. Inhibitory Review Problems Contents Anatomy

LET'S REVIEW all cerebellar inputs are excitatory mossy fibers=DSCT, CCT, PCT and VCT--terminate (excite) on granule cells climbing fibers=OCT-terminate (excite) directly Purkinje cells (by-passes granule), cause complex spikes in Purkinje cell granule cell is only excitatory cell in the cerebellar cortex-terminates (excites) on Golgi, basket and Purkinje cells--results in simple spikes in Purkinje cells (50-100/sec) Purkinje, Golgi and basket cells are all inhibitory basket=feedforward inhibition on Purkinje cells Golgi=feedback inhibition on mossy fiber-granule cell relay mossy and climbing fiber collaterals to the deep cerebellar nuclei are excitatory