Advances in Clinical and Experimental Medicine

Title abbreviation: Adv Clin Exp Med
JCR Impact Factor (IF) – 1.736
5-Year Impact Factor – 2.135
Index Copernicus  – 168.52
MEiN – 70 pts

ISSN 1899–5276 (print)
ISSN 2451-2680 (online)
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Advances in Clinical and Experimental Medicine

2016, vol. 25, nr 4, July-August, p. 605–609

doi: 10.17219/acem/61899

Publication type: original article

Language: English

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Quantitative Anatomy of the Trapezius Muscle in the Human Fetus

Mateusz Badura1,A,B,C,D, Magdalena Grzonkowska1,A,B,C,D, Mariusz Baumgart1,B,C, Michał Szpinda1,D,E,F

1 Department of Normal Anatomy, The Ludwik Rydygier Collegium Medicum in Bydgoszcz, The Nicolaus Copernicus University in Toruń, Poland


Background. The trapezius muscle consists of three parts that are capable of functioning independently. Its superior part together with the levator scapulae and rhomboids elevate the shoulder, the middle part retracts the scapula, while the inferior part lowers the shoulder.
Objectives. The present study aimed to supplement numerical data and to provide growth dynamics of the trapezius in the human fetus.
Material and Methods. Using methods of anatomical dissection, digital image analysis (NIS Elements AR 3.0), and statistics (Student’s t-test, regression analysis), we measured the length, the width and the surface area of the trapezius in 30 fetuses of both sexes (13™ k,17™ … ) aged 13–19 weeks.
Results. Neither sex nor laterality differences were found. All the studied parameters of the trapezius increased proportionately with age. The linear functions were computed as follows: y = –103.288 + 10.514 × age (r = 0.957) for total length of the trapezius muscle, y = –67.439 + 6.689 × age (r = 0.856) for length of its descending part, y = –8.493 + 1.033 × age (r = 0.53) for length of its transverse part, y = –27.545 + 2.802 × age (r = 0.791) for length of its ascending part, y = –19.970 + 2.505 × age (r = 0.875) for width of the trapezius muscle, and y = –2670.458 + 212.029 × age (r = 0.915) for its surface area.
Conclusion. Neither sex nor laterality differences exist in the numerical data of the trapezius muscle in the human fetus. The descending part of trapezius is the longest, while its transverse part is the shortest. The growth dynamics of the fetal trapezius muscle follows proportionately.

Key words

surface area, human fetuses, trapezius muscle, length, width

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