1. A method of promoting axonal regeneration of cerebellar granule cells (CGNs), dorsal root ganglion cells (DRGs) or retinal ganglion cells (RGCs) in a patient in need thereof, the method comprising administration of a monoclonal antibody or small molecule Epidermal Growth Factor Receptor (EGFR) inhibitor to thereby contact the CGNs, DRGs, or RGCs with the inhibitor sufficient to promote the axonal regeneration.