Charles Bonnet syndrome: Visual hallucinations in psychologically normal elderly people and most commonly associated in individuals with visual impairment .
Capgras syndrome: uncommon syndrome in which a patient has a delusional belief that a person, usually a family member or friend, has been replaced by an imposter.
French psychiatrist, Jean Marie Joseph Capgras (1873-1950) best known for his description ‘syndrome d’illusion des sosies’, Capgras syndrome in 1923
Sigbert Josef Maria Ganser (1853 – 1931) was a German psychiatrist. ‘Ganser syndrome’ an hysterical disorder he first described in 1898
Cotard syndrome: A rare condition characterized by nihilistic delusions, where a patient believes that they are dead, have missing organs, or have decaying or failing body parts.
Jules Cotard (1840 – 1889) was a French neurologist and psychiatrist. Délire de négations – Cotard Syndrome (1882)
Jean-Pierre Falret (1794 – 1870) was a French psychiatrist. Falret studied depression and suicide for 32 years and recorded cycles of depression and of elation which he named maladie circulaire and which is more commonly termed bipolar disorder
Jules Philippe Falret (1824 – 1902) was a French psychiatrist. 1877, along with Ernest-Charles Lasègue (1816-1883) first described the concept of Folie à deux, initially termed Lasègue-Falret syndrome.
Ernest-Charles Lasègue (1816 – 1883) French Physician. Eponym Lasègue sign of sciatic nerve irritation. Anorexia nervosa. Folie à deux. Conversion hysteria.