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Left musculus sternalis.
L A Arráez-Aybar1, J Sobrado-Perez, J R Merida-Velasco
1Department of Morphological Sciences II, Faculty of Medicine, University Complutense, Madrid, Spain. arraezla@med.ucm.es
Clinical Anatomy (New York, N.Y.)
|June 10, 2003
Summary
A rare sternalis muscle variant was found in a male cadaver. This anatomical finding highlights the importance of understanding such variations for clinical examination and diagnosis.
Area of Science:
- Anatomical variations
- Human morphology
- Clinical anatomy
Background:
- Anatomical dissections are crucial for understanding human morphology.
- Variations in skeletal muscle anatomy are common and clinically significant.
- The sternalis muscle is a rare anatomical variant with debated homology.
Observation:
- A sternalis muscle was identified in the left hemithorax of a 70-year-old male cadaver during routine dissection.
- Detailed observations were made regarding the muscle's position, anatomical relationships, and innervation.
- This finding contributes to the understanding of sternalis muscle prevalence and morphology.
Findings:
- The sternalis muscle presents significant anatomical variations in its occurrence, morphology, and insertion.
- Understanding its innervation is key to differentiating it from other thoracic structures.
- The incidence of the sternalis muscle varies across different populations and studies.
Implications:
- Awareness of the sternalis muscle is essential for accurate interpretation of thoracic imaging and physical examinations.
- This anatomical variant can be mistaken for other pathologies, impacting diagnosis and treatment.
- Further research into the sternalis muscle's embryological origin and clinical significance is warranted.