Ernest-Charles Lasègue

Ernest-Charles Lasègue (1816 – 1883) was a French Physician.

Credited with being one of those who described anorexia nervosa in 1873, which he called “hysterical anorexia.”

In 1877, along with Jules Philippe Falret (1824-1902) first described the concept of Folie à deux, initially termed Lasègue-Falret syndrome.

  • Born September 5, 1816 in Paris
  • Died 20 March 1883
Medical Eponyms
Lasègue sign (1864)

Patient supine with hip flexed – dorsiflexion of the ankle causes pain or muscle spasm in posterior thigh indicating lumbar root or sciatic nerve irritation

Lasègue-Falret syndrome (1877) [*aka Folie à deux] psychiatric syndrome in which symptoms of a delusional belief and hallucinations are transmitted from one individual to another.

Other eponyms
  • Lasègue manoeuvre: test of bilateral pulmonary expansion
  • Lasègue syndrome I: archaic, persecution mania (1852)
  • Lasègue syndrome II: anaesthetic induced conversion hysteria (1864)
Major Publications

eponymictionary CTA


the person behind the name

BA MA (Oxon) MBChB (Edin) FACEM FFSEM. Associate Professor Curtin Medical School, Curtin University. Emergency physician, Sir Charles Gairdner Hospital.  Passion for rugby; medical history; medical education; and asynchronous learning #FOAMed evangelist. Co-founder and CTO of Life in the Fast lane | Eponyms | Books | Twitter |

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