During the thirty seconds before and after death, the patient’s brain experienced a surge of gamma waves associated with memory retrieval, intense concentration, dissociative states, and dreaming. Laboratory rats experience the same surge of gamma waves when they die. The flood of memories experienced by Tyler Carroll as he drifted in and out of consciousness at a forward operating base in Afghanistan may be a trait common to all mammals, and the evolutionary advantage may simply lie in providing one last, compelling motivation to stay alive.
