Objective： To investigate the possible age- and sex-related differences in the various dimensions of corpus callosum among Chinese normal adults. Methods： Magnetic resonance images of 286 healthy adults, including 1...Objective： To investigate the possible age- and sex-related differences in the various dimensions of corpus callosum among Chinese normal adults. Methods： Magnetic resonance images of 286 healthy adults, including 127 males and 159 females, and ranging in age from 20 to 81 years, were investigated. They were classified into 5 age groups （ 20-29, 30-39, 40-49, 50-59, and 60-81 years old）. Corresponding to the age group sequence above, the male/female ratio of each group respectively was： 25/26, 26/33, 33/50, 32/36, and 11/14. The following dimensions of corpus callosum were systematically measured on the midsagittal Tl-weighted images： frontal to occipital pole （represented as line segment AB）, total longitudinal dimension of the corpus callosum （CD）, the maximum height （EF）, the widths of the genu （CX）, anterior one third （GH）, central region （EZ）, posterior one third （MN） and splenium （YD）. After that, the obtained data was analyzed statistically. Results： （1） The total longitudinal dimension, maximum height, widths of the genu, central region and splenium were proved to be larger in females. But the widths of the anterior one third and posterior one third were similar in-between. In spite of that, a conspicuous sex-related difference was not found. （2） The total longitudinal dimension and the maximum height of the corpus callosum remained stable in all age subgroups. Yet the widths of the genu, anterior one third, central region, posterior one third and splenium had a tendency of decreasing gradually with aging. Statistical difference was seen in the anterior one third, central region, posterior one third （P〈0.05）. Conclusion： There is no sex-related difference in all dimensions of corpus callosum. But, with aging, a significant difference is found in the widths of the anterior one third, central region and posterior one third.展开更多
目的研究正常成年人视频头脉冲检查(video head impulse test,vHIT)各项指标的正常值参考范围。方法 2017年1月至2017年8月对符合纳入标准的120例正常成年人进行视频头脉冲检查,记录以下指标:左侧、右侧水平半规管60ms瞬时增益值,左侧...目的研究正常成年人视频头脉冲检查(video head impulse test,vHIT)各项指标的正常值参考范围。方法 2017年1月至2017年8月对符合纳入标准的120例正常成年人进行视频头脉冲检查,记录以下指标:左侧、右侧水平半规管60ms瞬时增益值,左侧、右侧水平半规管回归增益值,左右侧水平半规管回归增益的不对称比,右前-左后半规管、左前-右后半规管的回归增益及其不对称比,分析结果。结果正常成年人60ms瞬时增益值的均值:水平半规管为1.55±0.37;回归增益值的均值:水平半规管为1.44±0.39,垂直半规管为1.27±0.19;回归增益不对称比的均值:水平半规管为4.17%±3.54%,垂直半规管为3.54%±3.33%。结论本研究得出正常成年人vHIT 60ms瞬时增益值的正常范围:水平半规管为>0.94;回归增益值的正常范围:水平半规管为>0.80,垂直半规管为>0.96;回归增益不对称比的正常范围:水平半规管为<9.98,垂直半规管为<9.00。本研究结果可为其临床应用提供参考。展开更多
文摘Objective： To investigate the possible age- and sex-related differences in the various dimensions of corpus callosum among Chinese normal adults. Methods： Magnetic resonance images of 286 healthy adults, including 127 males and 159 females, and ranging in age from 20 to 81 years, were investigated. They were classified into 5 age groups （ 20-29, 30-39, 40-49, 50-59, and 60-81 years old）. Corresponding to the age group sequence above, the male/female ratio of each group respectively was： 25/26, 26/33, 33/50, 32/36, and 11/14. The following dimensions of corpus callosum were systematically measured on the midsagittal Tl-weighted images： frontal to occipital pole （represented as line segment AB）, total longitudinal dimension of the corpus callosum （CD）, the maximum height （EF）, the widths of the genu （CX）, anterior one third （GH）, central region （EZ）, posterior one third （MN） and splenium （YD）. After that, the obtained data was analyzed statistically. Results： （1） The total longitudinal dimension, maximum height, widths of the genu, central region and splenium were proved to be larger in females. But the widths of the anterior one third and posterior one third were similar in-between. In spite of that, a conspicuous sex-related difference was not found. （2） The total longitudinal dimension and the maximum height of the corpus callosum remained stable in all age subgroups. Yet the widths of the genu, anterior one third, central region, posterior one third and splenium had a tendency of decreasing gradually with aging. Statistical difference was seen in the anterior one third, central region, posterior one third （P〈0.05）. Conclusion： There is no sex-related difference in all dimensions of corpus callosum. But, with aging, a significant difference is found in the widths of the anterior one third, central region and posterior one third.
