Muscle in 2nd compament of wrist?: (A) Extensor pollicis brevis, (B) Extensor carpi radialis brevis and longus, (C) Abductor pollicis longus, (D) Extensor pollicis longus
Answer is B. Extensor retinaculum has extensor tendons which are divided into 6 compaments which are as follows: 1st compament = Abductor pollicis longus& extensor pollicis brevis (both are affected in Dequervain'sTenosynovitis) 2nd compament = Extensor carpi radialis longus, extensor carpi radialis brevis (affected in tennis elbow) 3rd compament = Extensor pollicis longus (affected in colle's fracture) 4th compament = Extensor digitorum, extensor indicis 5th compament = Extensor digit minimi 6th compament = Extensor carpi Ulnaris