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rigor mortis

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Also known as postmortem rigidity

postmortem stiffening of the limbs of a corpse

Research

657 papers

via PubMed

~7 min read

Encyclopedic overview

Rigor mortis (from Latin rigor 'stiffness' and mortis 'of death'), or postmortem rigidity, is the fourth stage of death. It is one of the recognizable signs of death, characterized by stiffening of the limbs of the corpse caused by chemical changes in the muscles postmortem (mainly calcium). In humans, rigor mortis can occur as soon as four hours after death.

Physiology

Excerpted from Wikipedia’s “rigor mortis” article, available under the CC BY-SA 4.0 licence.