The term "post-traumatic amnesia" was first used in 1940 in a paper by Symonds to refer to the period between the injury and the return of full, continuous memory, including any time during which the patient was unconscious.
Betegnelsen "posttraumatisk amnesi" blev første gang brugt i en artikel fra 1940 af Symonds, der referere til perioden mellem skaden og tilbagevende til fuldstændig kontinuerlig hukommelse, herunder enhver tid hvor patienten var bevidstløs.