Commuting maps on rank-1 matrices over noncommutative division rings

Let n >= 3 beanaturalnumber. Let M-n(D) be theringofall n x n matrices over a noncommutative division ring D. In the present paper, we will find the description of all additive mappings G : M-n(D) -> M-n(D) such that [G(y), y] = G(y)y - yG(y) = 0 for all rank-1 matrix y. Precisely, wewillprovethat G(x) = lambda x + mu(x) for all x epsilon M-n(D), where lambda lies inthecenterof D and mu is acentral map.