The instantaneous rigor occurs in the roup of muscles which are emotionally involved or where the mind has concentrated to given a valuntary order to go in a protective contraction or responcse to agonising person physical or emotional, such group or muscles do not go in stage of primary retraction but go in instantaneous concentration and remain so during the phase of rigor mortis. After the rigor is passed off this expression remains fixed unless broken giving and suggested the cause and manner of death.
How it appears that the instructions to the coluntar groups of muscles before death conducted by segmental nerve remains sustained but in a Nux Vomica poisoning or in tatanus death the motor nurons of the Ant. Born cells of spinal cord produces strong concentrations. But these contractions rigor in the group of muscles is originating at the thalamic level and it has nothing to do with the local neural area.
Heat Stiffing - A difficult job to differentiate with Rigor. Burns are present but some part remains uneffected. A tell could be made. But the acid -- would be to pinch the skin. It stiffened to pinch the skin. It stiffened heat may have passed through ot tp the muscle to stuffen
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A stiff dead body on a stool |