ANATOMICAL STUDY OF THE INSERTION OF THE TRICEPS BRACHII TENDON IN THE OLECRANON THROUGH MAGNETIC RESONANCE IMAGING.

INTRODUCTION

The triceps brachii muscle (TBM) is the main muscle of the posterior aspect of the arm, occupying most of the extensor compartment. Proximally, it is composed of three heads: long, lateral, and medial, and presents a single tendon. Its insertion in the olecranon region remains controversial. Magnetic resonance imaging (MRI) assessment and detailed knowledge of this insertion may assist in orthopedic surgical reconstructions.

OBJECTIVE

To evaluate the anatomical aspect of the insertion of the triceps brachii tendon (TBT) into the olecranon regarding tendon insertion.

METHODS

In vivo MRI studies of patients were retrospectively evaluated. Two radiologists assessed 44 MRI scans from patients aged 20 to 50 years, with no previous triceps brachii tendon injuries or other TBT tendon pathologies.

RESULTS

There was agreement between the observers in the MRI scans evaluated, and the TBT insertion was found to be single.

CONCLUSION

The triceps brachii tendon presented a single insertion into the olecranon. Level of Evidence III; Retrospective Comparative Study.