A developmental process, independent of morphogenetic (shape) change, that is required for the trochlear nerve to attain its fully functional state. The trochlear nerve is a motor nerve and is the only cranial nerve to exit the brain dorsally. The trochlear nerve innervates the superior oblique muscle.
Source:
GOC:cls,
GOC:dph,
GO_REF:0000021,
GOC:dgh,
GOC:jid,
ISBN:0838580343