  We provide a general procedure to calculate the current-induced spin-transfer
torque which acts on a general steep magnetic texture due to the exchange
interaction with an applied spin-polarized current. As an example, we consider
a one-dimensional ferromagnetic quantum wire and also include a Rashba
spin-orbit interaction. The spin-transfer torque becomes generally spatially
non-local. Likewise, the Rashba spin-orbit interaction induces a spatially
nonlocal field-like nonequilibrium spin-transfer torque. We also find a
spatially varying nonadiabaticity parameter and markedly different domain wall
dynamics for very steep textures as compared to wide domain walls.
