한국인태아 주관절발육에 관한 연구

Abstract

The developmental feature of the elbow joint in the middle and later stages of the fetal period has been studied by measuring over 27 items on the articular capsule with its accessory ligaments and participating bone ends from 365 cases 081 cases of male and 184 cases of female) of the Korean fetuses aged from the 4th month to the term of the fetal life. 1. By the 4th month the length of the posterior part of the joint capsule is longer than that of the anterior part, as in that of the adult. The higher monthly developmental rate, however, is detectable on the length of anterior part of the joint capsule. 2. The medial collateral ligament is longer at the 10th month. as in the adult. Until 9th month, however, none of the practical difference on the length between the medial and lateral collateral ligaments is observed. 3. The growths of the various parts of the participating bone ends are relatively rapid until the 6th month. and become slow until the 8th. and relatively slower thereafter. The widths of them. however, show again a tendency of relatively rapid growth at the 10th fetal month. 4. The indices of the 13 important measurements to the body length are stabilized after the 8th month. In other words, after the 8th month the velocities of the growth of the various measurements are silmilar to that of the body length. 5. None of the sexual difference was found in present observation.