neuro on Instagram: "Froment sign is a classic clinical test for ulnar nerve palsy, especially weakness of the adductor pollicis muscle. 🔹 What is Froment Sign? It assesses the ulnar nerve (C8–T1) function at the hand. 🔹 How to Perform the Test 1. Ask the patient to hold a piece of paper between the thumb and index finger. 2. Try to pull the paper away. 3. Observe how the patient maintains grip. --- 🔹 Positive Froment Sign ✅ The patient flexes the thumb’s interphalangeal (IP) joint to hold th