Heat stiffening in muscles occurs above temperature (degC) -
Heat stiffening of muscles occur in temperature above 60 degree celsius due to denaturation and coagulation of muscle proteins. It simulates rigor mois. This remains till decomposition stas and there was no rigor mois. Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27 th edition pg. 80.
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Death and postmortem changes