The anatomical variants of the glenoid cavity in fetus

Abstract

Background: The human shoulder joint is a simple, non-aligned joint that forms between the palmar socket and the grip head. The head of the grip is spherical, and the surface area of the joint is three times larger than that of the glenoid, and although the range of motion is large, it is considered when it is not aligned, so the structure called labrum gleinodale is added to improve the alignment of the joint. 1,2, The shoulder joint is the glenoid and is a simple, non-conforming joint formed between the head and the grip. In the fetus, the palmar cup is formed and developed in stages. However, there are relatively few studies investigating the palmar pelvis and its anatomical variants in the fetus. Aim: To determine the anatomical variants of the palmar shape during the development of the Mongolian human fetus and their characteristics. Materials and Methods: In the study, 31 fetuses (13 females, 18 males) aged 15-38 weeks were determined, and the height and width of the scapula were measured using calipers. Results: The pear shape of the palmar cup was the most common in fetuses, 28 (90.3%) on the right side and 26 (83.9%) on the left side. On the other hand, the oval shape was defined in 3 (9.7%) on the right side and 4 (12.9%) on the left side. In 15-week-old fetuses, the height of the palmar cup was equal to 0.15 mm on the right and left sides, and the intensity of growth decreased slightly on both sides from the age of 22 weeks. Conclusion: 1. The pear-shaped shape of the palm of the Mongolian fetus is dominant, and the inverted comma-like shape is rare. 2. During the fetal ontogeny of the Mongolian man, the shape of the palmar cup is different in the shape of the right and left shoulder joints, which shows that it has a certain polymorphism.