  We consider a braneworld scenario in which a flat 4-D brane, embedded in
$M^{3,1} \times S^1$, is moving on or spiraling around the $S^1$. Although the
induced metric on the brane is 4-D Minkowski, the would-be Lorentz symmetry of
the brane is broken globally by the compactification. As recently pointed out
this means causal bulk signals can propagate superluminally and even backwards
in time according to brane observers. Here we consider the effective action on
the brane induced by loops of bulk fields. We consider a variety of self-energy
and vertex corrections due to bulk scalars and gravitons and show that bulk
loops with non-zero winding generate UV-finite Lorentz-violating terms in the
4-D effective action. The results can be accommodated by the Standard Model
Extension, a general framework for Lorentz-violating effective field theory.
