Pharmacology All are features of anterior interosseous nerve (AIN) syndrome except NOT RELATED A There is sensory loss on the medial 2 fingers B Inability to perform OK-sign (approximate thumb and tip of index finger) C AIN is entrapped under pronator teres, flexor digitorum profundus, flexor carpi radialis D Conservative treatment generally, surgery rarely 💡 Explanation All are features of anterior interosseous nerve (AIN) syndrome except NOT RELATED ✓ Correct Answer: A. There is sensory loss on the medial 2 fingers