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Distal Insertional Footprint of the Brachialis Muscle: 3D Morphometric Study
Srinath Kamineni1, Abdo Bachoura1, William Behrens1
1Elbow Shoulder Research Centre, University of Kentucky Department of Orthopaedic Surgery and Sports Medicine, Kentucky Clinic, 740 South Limestone, Lexington, KY 40536-0284, USA.
Anatomy Research International
|December 8, 2015
Summary
This study reveals significant gender differences in brachialis muscle footprint length at the ulna, crucial for understanding elbow joint biomechanics and surgical approaches.
Area of Science:
- Anatomy
- Biomechanics
- Orthopedics
Background:
- The brachialis muscle is a key elbow flexor.
- Understanding its distal insertion morphology is vital for elbow joint function and surgical interventions.
Purpose of the Study:
- To detail the three-dimensional (3D) morphometry of the brachialis muscle's distal attachment on the ulna.
- To analyze variations in the brachialis footprint based on gender and size.
Main Methods:
- Dissection of 50 cadaveric elbows.
- Isolation and 3D digitization of the brachialis distal insertion on the ulna.
- Comparative analysis of footprint shape, size, and dimensions between genders.
Main Results:
- Significant gender-based differences were observed in the surface length (P=0.002) and projected length (P=0.001) of the brachialis footprint.
- The shape of the brachialis footprint varied considerably among specimens.
- While muscle length showed significant gender differences, width and surface area exhibited minimal variation.
Conclusions:
- The brachialis muscle insertion morphology is highly individualized, with significant differences in shape across specimens.
- Gender significantly influences brachialis muscle length but not width or surface area at the distal ulna.
- This detailed morphometric data is essential for advancing kinematic understanding and improving surgical procedures of the elbow joint.
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