part of part of in taxon results in maturation of hypoglossal nerve development cranial nerve maturation hypoglossal nerve maturation A developmental process, independent of morphogenetic (shape) change, that is required for the hypoglossal nerve to attain its fully functional state. This motor nerve innervates all the intrinsic and all but one of the extrinsic muscles of the tongue. GO:0021619 CN XII maturation developmental maturation Tetrapoda hypoglossal nerve