Froment's Sign | Rationale & Interpretation

The video tutorial explains Froment's sign, a test for diagnosing ulnar nerve palsy. It covers the procedure for both negative and positive test results, highlighting the role of the lateral prehensile grip and thumb interphalangeal joint. A positive test indicates compensation due to weakness in the adductor pollicis muscle, often caused by ulnar nerve damage. The tutorial also discusses the involvement of the flexor pollicis longus muscle and the lack of psychometric data for Froment's sign.

What is the purpose of the test described in the text?

Describe the lateral prehensile grip and its significance in the test.

What does a positive Froment sign indicate?

Explain the role of the adductor pollicis muscle in the context of ulnar nerve palsy.

What compensatory mechanism occurs when there is weakness in the adductor pollicis muscle?