Rigor mortis starts in:
Correct Answer: Heart
Description: Ans: A (Heart) Ref: The Essentials of Forensic Medicine and Toxicology by KS Narayan Reddy. 29th edition. 2010Explanation:Rigor MortisThis is the state of stiffening and sometimes shortening of muscles following deathIt occurs due to lack of ATP after birth.When the ATP is reduced to a critical levels of 85% of normal, the overlapping portions of myosin and actin Filaments combine as rigid link of actomyosin. which is viscous and inextensible causing hardness and rigidity of muscles- Order of appearance: Heart (left) - eyelids facial muscles - neck and trunk - upper extremities - legs - muscles of fingers and toes.- it passes off in the same order. In India, it commences by 2-3 hrs, develops for 12 hrs. and usually lasts for 18-36 hrs in summer, and 24-48 hrs in winter.Time of Onset: In India, it begins 1 - 2 hours after birth.Duratin of RM: In India, it usually lasts for 24 - 36 hours during w inter and 16-24 hours during summer.Medico-legal ImportanceIt is a deFinite sign of deathIts extent helps in estimating the time since deathIt indicates the position of body at the time of deathConditions Simulating RMHeat stiffeningCold stiffeningCadaveric spasm or instantaneous rigiditySecondary RelaxationFlaccidity following RM is caused by action of the alkaline liquids produced by putrefaction.
Category:
Forensic Medicine
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now