Fascinating excerpt from a great video previously posted.
Moulage (French: casting/moulding) is the art of applying mock injuries for the purpose of training Emergency Response Teams and other medical and military personnel. Moulage may be as simple as applying pre-made rubber or latex “wounds” to a healthy “patient’s” limbs, chest, head, etc., or as complex as using makeup and theatre techniques to provide elements of realism (such as blood, vomitus, open fractures, etc.) to the training simulation. The practice dates to at least the Renaissance, when wax f
Source: Moulage – Wikipedia
Start at 11:11