Froments test is used in
Froment's sign: the patient is asked to grip a card firmly between thumbs and index fingers; normally this is done using the thumb adductors while the interphalangeal joint is held extended. In patients with ulnar nerve injury or palsy, because the adductor pollicis is weak, the patient grips the card only by acutely flexing the interphalangeal joint of the thumb using flexor pollicis longus which is supplied by the median nerve.(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 519)
Ulnar nerve injury
Median nerve injury
Radial nerve injury
Axillary nerve injury
All India exam