Scholars International Journal of Anatomy and Physiology (SIJAP)
Volume-1 | Issue-04 | 97-100
Original Research Article
A Study of Inter - Tendinous (Juncturae Tendinum) Connections between the Four Tendons of Extensor Digitorum Communis (EDC)
Dr. Shishirkumar, Dr. Shivarama CH
Published : Nov. 30, 2018
Abstract
Extensor digitorum communis arises from the lateral epicondyle of the humerus
by the common extensor tendon, the adjacent intermuscular septa and the antebrachial
fascia. It divides distally into four tendons, this tendons pass in a common synovial sheath
with the tendon of extensor indicis, through a tunnel under the extensor retinaculum. The
tendons run over the dorsum of the hand, one to each finger. The tendon to the index
finger is accompanied by extensor indicis, which lies ulnar (medial) to it. On the dorsum
of the hand, adjacent tendons are bonded by three variable intertendinous connections
(juncturae tendinum), which are inclined distally and radially. The digital attachments
enter a fibrous expansion on the dorsum of the proximal phalanges to which lumbrical,
interosseous and digital extensor tendons all attached. This study puts in a sincere effort to
study the intertendinous connections (juncturae tendinum) between the four tendons of
Extensor digitorum communis. 80 upper limb specimens of human cadaver were used to
study the type of intertendinous connections or juncturae tendinum (JT) between the four
tendons of Extensor digitorum communis which are seen in 2nd, 3rd and 4thintermetacarpal
spaces. The special findings are photographed; all the findings are tabulated and analyzed
statistically. Statistically the differences between the right and left hand for the above
mentioned tendons and juncturae tendinum were insignificant (p value >0.05). Type 1 JT
is most common in 2nd IMS, Type 2 is common in 3rd IMS and Type 3r and Type 3y are
found in 4th IMS.