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Deep and shallow forms of the sulcus for extensor carpi ulnaris
T Nakashima1, T Hojo, H Furukawa
1Department of Anatomy and Anthropology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
Journal of Anatomy
|December 1, 1993
Summary
Anatomical variations of the extensor carpi ulnaris tendon sulcus were analyzed in 240 upper limbs. Most variations were congenital, with a deep sulcus (Grade I) being the most common form.
Area of Science:
- Anatomy
- Orthopedics
- Human Morphology
Background:
- The extensor carpi ulnaris tendon sulcus is a groove on the distal ulna.
- Understanding its anatomical variations is crucial for surgical procedures and biomechanical studies.
Purpose of the Study:
- To classify and quantify the anatomical variations of the extensor carpi ulnaris tendon sulcus.
- To determine the prevalence of different sulcus forms and their relationship with age.
Main Methods:
- Dissection and morphological analysis of 240 human upper limbs.
- Classification of the sulcus into four grades based on depth: deep (Grade I), shallow (Grades II and III), and flat (Grade IV).
Main Results:
- A deep sulcus (Grade I) was observed in 51.3% of cases.
- Shallow forms (Grades II and III) accounted for 28.8% and 14.2%, respectively.
- A rare flat form (Grade IV) was found in only 1.3% of the specimens. Variations were congenital and not age-related.
Conclusions:
- The extensor carpi ulnaris tendon sulcus exhibits significant anatomical variability.
- Deep sulcus morphology is the most prevalent, suggesting a common anatomical configuration.
- These congenital variations are important considerations in forearm and wrist anatomy.