Shell shock. How many a brief bombardment had its long-delayed aftereffect in the minds of these survivors, many of whom had looked at their companions and laughed while inferno did its best to destroy them. Not then was their evil hour; but now; now, in the sweating suffocation of nightmare, in paralysis of limbs, in the stammering of dislocated speech.
Herman cites Sassoon to establish the phenomenological signature of shell shock—delayed onset, intrusive nightmare, somatic paralysis, and speech disruption—as the foundational description of combat-induced traumatic neurosis.
, Trauma and Recovery: The Aftermath of Violence—From Domestic Abuse to Political Terror, 1992thesis