Froment is remembered for his work with
neurological diseases. 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. It is now known as Babinski-Froment syndrome. 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. This test is used to assess the condition of the
adductor pollicis muscle. == Written works ==