This paper is devoted to the problems of clinical and biochemical studies of the walking characteristics of the subjects with the injuries to the locomotor apparatus. The data presented reflect the criteria for the medical and socio-medical assessment of walking disorders that allow for the objective interpretation of the results of diagnostics and treatment of the patients presenting with pathological changes in the organs of movement. It is shown that these criteria still poorly developed and adapted to the purposes of forensic medical practice can be employed for the expert estimation of damages to the pelvis and large joints of the lower extremities.