Louis Vivet

[4] While working on a farm at age 17, Vivet became paralyzed from the waist down due to severe trauma resulting from a viper wrapping itself around his hand, inducing psychosomatic paralysis.

[4] When confronted by the asylum (which had begun housing him upon his paralysis) regarding his newfound ability to walk, Vivet responded with confusion, not recognizing any of the hospital staff and accusing them of imprisoning him.

[5] Vivet's symptoms, including loss of time and amnesia, were explained by the first psychologist to treat him, Camuset, as divisions in his personality, and were not directly linked to his history of childhood trauma until his case was re-evaluated approximately 100 years later.

[7] Philosopher Ian Hacking has argued that the term "multiple personality disorder" first came into use on 25 July 1885, when Vivet entered the health system and became the subject of intensive psychiatric experimentation.

He continues: These alternated and involved both dissociation and retraction of the field of consciousness: Each had different memories, personal characteristics, and varying degrees of sensory and movement problems.