quizlet 1. in moderate diffuse axonal injury, the score on the gcs is 4-8 initially and 6-8 by 24 hours, and the person is confused and suffers a long period of posttraumatic anterograde and retrograde amnesia. in mild diffuse axonal injury, coma lasts 6-24 hours, with 30% of persons displaying decerebrate or decorticate posturing. experiences immediate autonomic dysfunction that disappears in a few weeks. increased icp appears 4-6 days after the injury.