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<正>数字解剖学(digital anatomy)是利用信息技术和数字化方式研究的一门新兴学科,数字人(digital human)是基于电子信息技术,将解剖学和影像结合后获取人体解剖结构的基础数据,在计算机上建立起的人体结构三维模型~([1])。数字解剖学作为教学的辅助工具已在国内外得到了广泛应用~([2-3])。 相似文献
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正因人心传导系统的体积较小以及肉眼解剖分离较困难~([1]),导致显露人心传导系统的解剖标本较少见。即使完成了人心传导系的标本制作,也因其太细小而不利于观察研究。目前,心传导系统的解剖学教学标本多以局部暴露的动物心或模型化~([2])标本呈现。因这些标本存在与人心的物种差异和模型化后的解剖学要素失真,不利于,甚至误导医学生对人心传导系统的形态特征的学习~([3])。为教学和科研提供真实的、便于直接观察的人心传导系统的解剖标本,笔者参考前期建立的解剖人心房室传导轴技术分离房室传导组织后~([4]),再以标本缸上镶嵌放大镜的方法制备组织结构被放大的装缸式解剖标本,现对标本制作方法介绍如下。 相似文献
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Properties of chemoreceptors of tongue of rat 总被引:14,自引:0,他引:14
BEIDLER LM 《Journal of neurophysiology》1953,16(6):595-607
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A further analysis of already published data supports the position that retardates of low ability level less frequently have retarded siblings, retarded parents, and parents low in occupational level than do retardates higher in ability level. The analysis supports the position that there are two types of retarded individuals, persons retarded as a result of gene or chromosomal anomalies, brain injury, etc., who more frequently occur in the lower-level retardate group, and persons whose retardation represents polygenic segregation, who more frequently occur in the higher-level group. 相似文献
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Eighteen families in which both parents had refractions within the range of +4·0 D to −4·0 D and axial lengths seen in emmetropia (22·3-26·0 mm) showed coefficients of correlation of the order 0·5 indicative of polygenic inheritance. Such coefficients were seen for axial length (0·407) and for the cornea (0·487), but not for the lens (which is known to be yoked to the axial length). No such coefficients were seen in 19 families in which one of the parents had axial length outside the emmetropic range (nine families with long axes and 10 with short axes).
The pattern of polygenic inheritance for emmetropia (completely correlated optical components) and errors of refraction up to 4·0 D (inadequately correlated components: correlation ametropia) follows that seen in stature and other measurable characters. In contrast the high refractive errors with their abnormal axial lengths (component ametropia) are—like the extremes in stature—pathological anomalies with monofactorial inheritance.
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