The cerebellum has 4 deep nuclei embedded in its white matter. From lateral to medial they are dentate, emboliform, globus, & fastigial. Axons from these nuclei provide most output fibers of the cerebellum. These nuclei receive inhibitory (GABAergic) inputs from the Purkinje cells of cerebellar cortex and excitatory (glutamatergic) collaterals from both types of cerebellar inputs: mossy fibers and climbing fibers. Modern texts usually combine the emboliform and globus into the ‘interposed’ nuclei (see spinocerebellum).
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