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Question 7#

Of the extensor tendon compartments on the dorsum of the wrist:

A. The extensor pollicis longus (EPL) alters direction around the ulnar styloid
B. The extensor indicis proprius (EIP) shares a compartment with extensor digitorum communis (EDC)
C. The first compartment contains the extensor carpi radialis longus (ECRL) and extensor carpi radialis brevis (ECRB)
D. The posterior interosseous nerve runs in the third compartment
E. The extensor carpi ulnaris (ECU) and extensor digiti minimi (EDM) share the fifth compartment

Correct Answer is B

Comment:

The extensor indicis proprius (EIP) shares a compartment with extensor digitorum communis (EDC). The first compartment contains APL and EPB. The second compartment contains ECRL and ECRB. The third compartment contains EPL altering direction around the tubercle of Lister. The fourth compartment contains EDC, EIP and the posterior interosseous nerve. The fifth compartment contains EDM. The sixth compartment contains ECU.