Henri Marie Jean Louis Ey (French: [ɛ]; 10 August 1900, Banyuls-dels-Aspres – 8 November 1977, Banyuls-dels-Aspres) was a French neurologist, psychiatrist, psychoanalyst and philosopher.
Ey was born on 10 August 1900 in Banyuls-dels-Aspres, Pyrénées-Orientales, and died there on 9 November 1977.
After the second world war Ey renewed the group L'Evolution Psychiatrique with Eugène Minkowski.
Ey developed an "organodynamic psychology" and a theory of the structure of states of consciousness, in which he developed ideas of Pierre Janet and John Hughlings Jackson.
[1] It was under the title of Organodynamic Psychology that Ey developed a unifying psychology which included both organic (neurological, genetic, etc.)