Related Experiment Videos
Accessory extensor carpi radialis muscle and interconnecting muscular bundle
Y Gümüşalan1, A Kalaycioğlu, F Yazar
1Department of Anatomy, Faculty of Medicine, Gülhane Military Medical Academy, Ankara, Turkey.
Acta Anatomica
|January 1, 1997
Summary
Anatomical variations in the forearm were identified in a cadaver, including an accessory muscle and muscular bundle in both arms. These findings detail unique formations of the extensor carpi radialis brevis and longus muscles and tendons.
Area of Science:
- Anatomy
- Human Anatomy
- Forearm Anatomy
Background:
- Anatomical variations in the human forearm are not uncommon.
- Understanding these variations is crucial for surgical procedures and interpreting imaging studies.
Purpose of the Study:
- To document and describe unique anatomical variations found in the forearm muscles and tendons of a cadaver.
- To provide detailed morphological data on accessory muscles and bifid tendons in the extensor compartment.
Main Methods:
- Cadaveric dissection of both forearms of a 55-year-old male.
- Detailed observation and preparation of accessory muscles and muscular bundles.
- Documentation of muscle origin, course, relations, and tendon insertions.
Main Results:
- Left Forearm: An accessory muscle originated from the extensor carpi radialis brevis (ECRB), coursed posterior to its tendon, passed through the extensor retinaculum, and inserted into the second metacarpal base. A muscular bundle was noted between the extensor carpi radialis longus (ECRL) and ECRB.
- Right Forearm: Both ECRL and ECRB exhibited bifid tendons. An additional ECRL tendon joined an accessory ECRB tendon before entering the extensor retinaculum, inserting into the second metacarpal base.
Conclusions:
- This case presents rare bilateral anatomical variations in the extensor forearm musculature.
- The identified accessory muscle and bifid tendons highlight the importance of detailed anatomical knowledge for clinicians and surgeons.