Although the University of Michigan Highway Safety Research Institute did get bad publicity, it was suggested that this is not the reason why they stopped using baboons. The University of Michigan's mission was to create safer cars for human use. In order to reach this goal, research and testing is inevitable. The cruelty and the moral dilemmas of animal testing did not trump researchers still using them as subjects. They reasoned that biomechanics data are needed for an experiment like this, which will lead to safer cars. Years later, animal testing ceased and instead an instrumented dummy was created as a replacement. In 1978, animals were their only subjects that could be a reliable substitution for the human being. The disadvantage, though, to using an instrumented dummy or a human cadaver, is that the tissue is not alive and will not elicit the same response as a live animal. By 1991, the use of animals in vehicle collision tests was in decline because of advances in computers and technology. It is difficult to use cadavers instead of animals because of human rights, and it is difficult to obtain permission from the families of the deceased. Consent for a research and testing can occur only if the person responsible for giving consent is mentally competent and comprehends the research and testing procedures fully.