Propriyosepsiyon ve Denge Kontrolü ile El İkinci ve Dördüncü Parmakların Uzunluk Oranı Arasındaki İlişkinin İncelenmesi

Abstract

Prenatal exposure to testosterone is known to play an important role in the development of the fetal nervous system, genitourinary system and finger length. Specifically, prenatal testosterone exposure leads to an increase in the length of the 4th finger in the fetal hand. In this case, people with high prenatal testosterone exposure have a low 2D:4D finger ratio. Since balance control and proprioception are closely related to the development of the nervous system, we aimed to investigate whether there is a relationship between the 2D:4D finger ratio, which is considered as an indirect indicator of prenatal testosterone exposure, and balance parameters and knee proprioception. Fortytwo male individuals participated in the study. We measured 2D:4D finger ratio by finger length measurement via scanner, static balance with Zebris™ FDM-2 device, dynamic balance with Star Balance Test and knee proprioception data with angle repetition method.The results showed that there is no significant correlation between balance and 2D:4D finger ratios. However, in terms of knee proprioception, a significant correlation was observed between the performance of the left knee at 45° and both the right and left hand 2D:4D ratios. When comparing low and high 2D:4D finger ratios there was no difference in terms of static and dynamic balance but in terms of knee proprioception values, the margin of error in the left knee 45° performance of the participants with low 2D:4D ratios were lower than the participants with high 2D:4D ratios. When comparing the right and left legs in terms of dynamic balance there was a significant difference in the performance between the medial and lateral sides. However, in terms of right and left knee performance, there was a significant difference between the groups only when the target angle was 15°. As a result, even though there was no correlation between 2D:4D finger ratio and the static and dynamic balance; there was a correlation between the lateralization difference and 2D:4D finger ratio at some angles in terms of the knee proprioception.