In this case whether it "works" is a matter of where to draw the line. The Zombie Preacher of Somerset that Good_Burning_Plastic linked had an animated body, with competent mental faculties and some psychological continuity with the former person. If he could become a zombie from a blow to the head, it seems quite plausible (for the purpose of writing fiction, not for making predictions) that the same could happen with cryonics.