Extensor Digitorum Brevis In Hand

Summary

Two cases of the presence of Extensor digitorum brevis in hand are presented.

Cadaver No, 1—During routine dissection the tendon of Extensor indicis was absent from its normal position in the fourth compartment under the extensor retinaculum of Instead one fleshy belly was seen on The origin of hand. the dorsum of both hands, the belly was aponeurotic from dorsal radiocarpal and intercarpal ligaments. The fleshy belly gradually became tendinous and was seen to pass along the medial side of Extensor digitorum tendon for the index finger, forming the extensor expansion. The muscle was bigger in the right hand (Fig. 1). The nerve supply was from terminal part of deep branch of radial nerve.

Cadaver No. 2-One fleshy belly was seen on the dorsum of hand, supplementing the tendon of Extensor digitorum for the middle finger. 1t was present only in the left hand. The origin of the muscle was aponeurotic from radiocarpal and intercarpal ligaments. The muscle was crossed superficiallp by the tendon of Extensor indicis. The fleshy belly became tendinous to join Extensor digitorum for the middle finger from its lateral side. The nerve supply came from terminal part of deep branch of radial nerve (Fig. 2).

Publication History

Article published online:
19 February 2024