Immediate stiffness postmoem occurs in -
Immediate rigor occurs in cadaveric spasm which is contraction of muscles during life which become stiff and rigid immediately after death. Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27 th edition pg. 81.
Cadaveric rigidity
Cadaveric spasm
Rigor mois
Algor mois
Death and postmortem changes