Rigor mortis

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Signs of death

Pallor mortis
Algor mortis
Rigor mortis
Livor mortis Decomposition

Rigor mortis is a condition that affects a human body after death. Rigor mortis causes the muscles in the body to become rigid. It starts to happen three to four hours after death. Twelve hours after death, the muscles have become fully rigid. The condition usually lasts until 36 hours after death. At that time, the muscles start to relax.