Anna O, who suffered from hysteria, somatic symptoms, and dissociation.

Freud and his colleague Breuer hypothesized that her condition was caused by repressed traumatic memories that were brought to consciousness through hypnosis and catharsis.

  • The case of Little Hans, who developed a phobia of horses after witnessing a horse collapse and die on the street. Freud attributed his fear to his castration anxiety and his unconscious sexual attraction to his mother.