Term used in World War I to designate a wide variety of mental disorders presumably due to combat experience.
A term used in World War I for what is now referred to as posttraumatic stress disorder. It was originally believed to be caused by sudden atmospheric changes from nearby explosions.
A term used during World War I to designate a wide variety of psychotic and neurotic disorders associated with the stress of combat.
A term coined during the First World War to describe a nervous collapse attributed to the sound of shellfire. In contemporary understanding, shell shock may result from either battle fatigue in individuals exposed to extreme stress or, alternatively, a lack of psychological resilience, leading individuals to break down as a means of escaping from distressing and unbearable circumstances.