The assessment of injury risk to the head and neck is based on accelerometer derived head injury criteria and various other parameters as measured by anthropomorphic dummies and as predicted by mathematical models. Despite the large amount of research which has been conducted in the development of these criteria and in the improvement of the physical and mathematical models, accurate prediction of neck injury potential in generalized head impact has been limited by the complexity of head and neck dynamics. This study more accurately describes the dynamics of head and neck impact with the eventual goal of improving the biofidelity of mechanical surrogates and improving the scope of the various head and neck injury criteria. An experimental apparatus and protocol have been developed which will see continued use as issues concerning the development of a neck injury criteria are addressed. The data will be useful in the validation of the next generation of computational and physical head and neck models.