PEQULIARITIES of MORPHOGENESYS and TOPOGRAPHY of INFRAHYOID TRIANGLES in HUMAN PREFETUSES and FETUSES 10.36740/Wlek202101120
Wiadomości Lekarskie, VOLUME LXXIV, ISSUE 1, JANUARY 2021 © Aluna Publishing ORIGINAL ARTICLE PEQULIARITIES OF MORPHOGENESYS AND TOPOGRAPHY OF INFRAHYOID TRIANGLES IN HUMAN PREFETUSES AND FETUSES 10.36740/WLek202101120 Olexandr V. Tsyhykalo1, Iryna S. Popova2, Olga Ya. Skrynchuk3, Tetiana D. Dutka-Svarychevska4, Larysa Ya. Fedoniuk5 1DEPARTMENT OF HISTOLOGY, CYTOLOGY AND EMBRYOLOGY, BUKOVINIAN STATE MEDICAL UNIVERSITY, CHERNIVTSI, UKRAINE 2DEPARTMENT OF HISTOLOGY, CYTOLOGY AND EMBRYOLOGY, BUKOVINIAN STATE MEDICAL UNIVERSITY, CHERNIVTSI, UKRAINE 3DEPARTMENT OF PHARMACY, BUKOVINIAN STATE MEDICAL UNIVERSITY, CHERNIVTSI, UKRAINE 4DEPARTMENT OF HISTOLOGY, CYTOLOGY AND EMBRYOLOGY, BUKOVINIAN STATE MEDICAL UNIVERSITY, CHERNIVTSI, UKRAINE 5MEDICAL BIOLOGY DEPARTMENT OF THE I. HORBACHEVSKY STATE MEDICAL UNIVERSITY, TERNOPIL, UKRAINE ABSTRACT The aim: To investigate morphology and developmental features of anatomical structures in the infrahyoid triangles of human neck during prefetal and fetal periods of human ontogenesis. Materials and methods: We have studied 30 specimens of human prefetuses from 7th till 12th week (16,0-82,0 mm of parieto-coccygeal length (PCL)) and 30 human fetuses aged from 4th till 10th month (84,0-360,0 mm PCL) of intrauterine development by the means of macro-, microscopy, morphometry, three-dimensional remodeling and statistical analyses. Results: We can observe anterior triangle in human fetuses after the time when common precursor muscular mass splits into two: the anterior and posterior portions which will give rise to the sternocleidomastoid and trapezoid muscles accordingly. The area index of the central triangle in human fetuses 4th – 10th month of intrauterine development shows the increasing tendency with the highest rates at 8th–10th months period – 1100-1200 mm2. The angulated course of omohyoid muscle is visible at late prefetal and early fetal periods (3-4th month; 80,0-130,0 PCL) as well as the presence of intermediate tendon.
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