British authorities banned the term shell shock during World War II to avoid an epidemic of cases, and the term posttrauma concussion state was coined in 1939 to describe "disturbance of consciousness with no immediate or obvious pathologic change in the brain".
Britiske autoriteter forbød termen granatchok under 2. verdenskrig, for at undgå et epidemi af tilfælde, og termen posttrauma hjernerystelses stadie blev opfundet i 1939 for at beskrive "forstyrrelsen i bevidstheden, uden nogen umiddelbar eller indlysende patologiske ændringer i hjernen".