Rigor Mortis

Rigor mortis is the stiffening of muscles that occurs in the early stages of death. It develops within 2-4 hours after death and reaches its peak around 12-24 hours. It is caused by calcium-dependent processes and is the result of the inability of muscle cells to bind adenosine triphosphate (ATP), the primary energy source of muscle cells. Rigor mortis is medically significant as it can help to estimate the time of death, provide evidence in the context of criminal investigations, and help determine the cause of death. It is also of interest to scientists as it can provide insight into the biochemical mechanisms of cell death and allow researchers to study the biochemical changes associated with muscle metabolism.