Rigor mortis

Rigor mortis is a recognizable sign of human death that is caused by a chemical change in the muscles, causing the limbs of the corpse to become stiff ("rigor") and impossible to move or manipulate. Typically rigor sets in several hours after clinical death, and subsides spontaneously in about two days, though the time of its onset and duration depends on ambient temperature.

The signs of death are usually noted as algor mortis, rigor mortis, livor mortis and decomposition.

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