Introduction. The brachial plexus injury represents 3-5% of all injuries and is considered to be one of the most serious types of injuries to the musculoskeletal system, due to the development of severe and often irreversible changes.
The objective of the study was to establish the features of blood supply and innervation of the shoulder girdle muscles in 4-10-month-old human fetuses.
Materials and methods. Using methods of macromicroscopic preparation, vascular injection and morphometry, the fetal topography of the arteries and nerves of the shoulder girdle muscles was studied in 37 human fetuses, 4-10-month-old.
Results. The quadrangular space in the experimental fetuses is a narrow axillary canal in which three permanent walls, anterior and posterior foramina can be distinguished. The surgical neck of the humerus is the fourth non-permanent wall of the axillary canal. At the same time, the branching of the axillary nerve into secondary trunks for the most part occurs before entering the canal or in the canal itself. The triangular space looks like an axillary fissure. It has been established that the nature of the intramuscular distribution of blood vessels and nerves in each muscle of the shoulder girdle is peculiar and differs in the topography of muscle fiber bundles. In all the muscles of the shoulder girdle, intra-and intramuscular anastomoses between arteries of different orders and diameters were clearly detected.
Conclusions. The axillary nerve is involved in the innervation of the posterior artery, enveloping the humerus and of its branches. In each muscle, one can meet both a loose and a main pattern of branching of the arteries regardless of their shape. When the direction of the vessels and muscle bundles is in line, the main form of branching (infraspinous and subscapularis muscles) is usually formed, and if they do not conform, it is mainly loose (deltoid, supraspinous, teres minor and major muscles).
Keywords: muscle, shoulder girdle, blood supply, innervation, fetus, human.
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Tetiana V. KHMARA
Higher State Educational Institution “Bukovinian State Medical University”, Chernivtsi, 58001,
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