儿童胼胝体压部及枕钳成角的解剖学观测

Anatomic observation of angles formed by splenium corporis callosi and occipital forceps in children

目的：研究儿童胼胝体压部及枕钳成角在年龄及性别方面的差异及变化规律。方法：120例健康儿童（年龄5d～14岁）按≤1岁、〉1～3岁、〉3～6岁、〉6～10岁和〉10～14岁分为5组分别行脑部常规MRI和DTI扫描。在所得各向异性值图上测量胼胝体压部及枕钳成角角度，并对所测数据进行统计学分析。结果：枕钳角度及胼胝体压部最大成角于≤1岁组内具有性别差异，胼胝体压部最小成角于〉6～10岁组内差异具有统计学意义；枕钳角度及胼胝体压部成角在均值上呈减小趋势；等级相关分析，枕钳角度与年龄呈负相关。结论：胼胝体压部及枕钳成角角度存在一定的性别差异；枕钳成角及部分胼胝体压部成角随年龄的增长而减小。

To study the age and sex difference in angles formed by splenium corporis callosi and occipital forceps in children. Methods： 120 healthy children （aged from 5 days to 14 years） were classified into five groups （≤1 year, 〉1-3 years, 〉3-6 years, 〉6-10 years, 〉10-14 years） and underwent conventional MRI and DTI. The angles formed by splenium corporis callosi and occipital forceps were measured in fractional anisotropy maps and were analyzed statistically. Results.. There was a significant sex difference in angles formed by occipital forceps in group ≤1 year. And the difference was found as well in group 〉6-10 years in the minimum angles formed by splemium corporis callosi. The means of angles formed by splemium eorporis and occipital forceps tended to decrease. The angles formed by occipital forceps were negatively correlative with ages by the analysis of Spearman＇s test. Conclusion： Sex differences might exist in the angles formed by both sides of occipital forceps and splenium corporis callosi. The angles formed by sides of occipital forceps and parts of angles of splenium corporis eallosi might decrease with age increasing.