An experimental study of the backward movement of President Kennedy's head.
D001930:Brain Injuries / Q000473:pathology*; D006259:Craniocerebral Trauma / Q000473:pathology*; D005197:Famous Persons; D049673:History, 20th Century; D006801:Humans; D008297:Male; D009068:Movement; D012886:Skull / Q000473:pathology; D014481:United States; D014948:Wounds, Gunshot / Q000473:pathology*