Three-dimensional muscle architecture of the infant and adult trapezius: a cadaveric pilot study

• DOI: 10.2399/ana.20.828627
• Publication Date: 2021-08-15T15:13:15Z
• Authors: Mikaela L. Stiver; Luke R. Bradshaw; Ethan M. Breinhorst; Anne M. R. Agur; S. Ali Mirjalili
• Keywords: Cadaveric spasm; Trapezius muscle; Muscle architecture

Objectives: The elaborate morphometry of the human trapezius muscle facilitates its involvement in numerous active movements shoulder girdle and passive stabilization upper extremity. Despite functional importance throughout lifespan, little is known about 3D architecture at any post-natal timepoints. Accordingly, aim this preliminary cadaveric study was to digitize, quantify, model, compare two temporal extremes: infancy adulthood. Methods: We examined female formalin-embalmed cadavers, aged 6 months 72 years, respectively. meticulously dissected each muscle, allowing us digitize model comprehensive situ fiber bundle level. quantified standard architectural parameters facilitate comparison between partition (i.e., descending, transverse, ascending) proportionally infant adult specimens. Results: found markedly different patterns length range, physiological cross-sectional area, volume within muscles. Notably, proportional area ascending descending partitions equal (1:1) infant, contrast 3:1 adult. transverse were similar, accounting for over half whole both Conclusion: This provides insights into an unparalleled level detail precision. quantifiable differences appear coincide with development-a notion that warrants further investigation larger samples longitudinal approaches.