Jules Froment

During World War I, he was stationed at Rennes, where he treated soldiers with nervous disorders.

After the war, he co-wrote an important work with Joseph Babiński (1857–1932) concerning the etiology of phenomena such as "shell shock" and "combat hysteria."

The study was titled Hystérie, pithiatisme et troubles nerveux d'ordre réflexe en neurologie de guerre, and was considered controversial at the time.

Also with Babiński, Froment is credited with describing a disease characterized by a combination of vasomotor disorders, muscular atrophy and tissue damage.

Froment is credited with devising a series of tests for nerve dysfunction, including a simple way to test ulnar nerve weakness in the hand (known as Froment's sign): if a patient holds a sheet of paper between thumb and index finger and the thumb flexes, this indicates ulnar nerve palsy.