European Journal of Anatomy

Official Journal of The Spanish Society of Anatomy
Cover Volume 2 - Number 1
Eur J Anat, 2 (1): 1-84 (1998)

Accesory tendons of the extensor carpi radialis muscles

R.C. Young, J.R. Sañudo*, R.M. Mirapeix* and P. Abrahams

Department of Anatomy. Cambridge University. Cambridge. England * Department of Morphological Sciences. Autonomous University of Barcelona. Spain

ABSTRACT Accessory tendons of the extensor carpi radialis longus and the extensor carpi radialis brevis museles were studied in 80 upper limbs belong­ ing to 40 preserved cadavers. We observed accessory accessory tendons in 27 cases (33.8%). The accessory tendons in 4 cases (5%) belonged to a supernumerary musele (extensor carpi radialis intermedius), in 4 cases (5%) to a eleft of the tendons and in 19 cases (24%) to an intermedius tendinous slip. In 18.5% of the fore­ arms, the tendinous slip arose from the extensor carpi radialis longus and in 8% from the exten­ sor carpi radialis brevis. The tendinous slip which arose from the extensor carpi radialis Ion­ gus was inserted on the base of the third meta­ carpal bone deep to the insertion of the exten­ sor carpi radialis brevis whereas the tendinous slip which arose from the extensor carpi radial­ is brevis was inserted on the base of the second metacarpal bone at the radial side of the inser­ tion' of the extensor carpi radialis longus. The presence of the two tendinous slips of different origins in the same arm occurred in 4 cases (5%); in these cases the slip from the extensor carpi radialis brevis crossed superficially to the slip from extensor carpi radialis longus. There were no significant differences according to sex or side.

Keywords: Accessory tendons of the extensor carpi radialis longus and the extensor carpi radialis brevis museles were studied in 80 upper limbs belong­ ing to 40 preserved cadavers. We observed accessory accessory tendons in 27 cases (33.8%). The accessory tendons in 4 cases (5%) belonged to a supernumerary musele (extensor carpi radialis intermedius), in 4 cases (5%) to a eleft of the tendons and in 19 cases (24%) to an intermedius tendinous slip. In 18.5% of the fore­ arms, the tendinous slip arose from the extensor carpi radialis longus and in 8% from the exten­ sor carpi radialis brevis. The tendinous slip which arose from the extensor carpi radialis Ion­ gus was inserted on the base of the third meta­ carpal bone deep to the insertion of the exten­ sor carpi radialis brevis whereas the tendinous slip which arose from the extensor carpi radial­ is brevis was inserted on the base of the second metacarpal bone at the radial side of the inser­ tion' of the extensor carpi radialis longus. The presence of the two tendinous slips of different origins in the same arm occurred in 4 cases (5%); in these cases the slip from the extensor carpi radialis brevis crossed superficially to the slip from extensor carpi radialis longus. There were no significant differences according to sex or side.

European Journal of anatomy
ISSN 2340-311X (Online)