<prompt> Which of the following is the Nystens lawCadaveric rigidity does not appear in hot humid conditionsCadaveric rigidity appears faster in older and the young than in middle ageCadaveric rigidity occurs in men earlier than in womanCadaveric rigidity affects successively the masticatory muscles, those of the face and the neck, those of the trunk and arms and finally those of lower limbs rruk  <response>: In rigor mois, all muscles of body, both voluntary and involuntary are involved. Externally it first appears in the eye lids, then lower jaw, muscles of the face, neck upper limbs and lastly lower limbs. This descending pattern or proximodistal progression is called Nystens law. Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 26 