| 人、猫、狗、兔脊髓的面积和体积的比较 |
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| 引用本文： | 张可仁,任惠民,马兆龙.人、猫、狗、兔脊髓的面积和体积的比较[J].西安交通大学学报(医学版),1981(2). |
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| 作者姓名： | 张可仁 任惠民 马兆龙 |
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| 作者单位： | 西安医学院解剖教研室
(张可仁，任惠民)，西安医学院解剖教研室(马兆龙) |
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| 摘 要： | 本文选用三条人的脊髓,九条猫的脊髓,三条狗的脊髓,四条免的脊髓进行了研究。1.人脊髓最长的脊髓节是第三胸脊髓节(Th3),猫是第十二胸脊髓节(Th12),狗是第四颈脊髓节,兔是第三腰脊髓节(L3)。在人和动物,一般来说脊髓胸段都比脊髓其它段长。人和狗的脊髓颈段比腰骶段(L-S)长。猫和兔的腰骶段比颈段长。2.灰质体积的比较是人、猫、狗、兔的腰膨大均比颈膨大的灰质体积大。人的胸段灰质体积最大。3.人的脊髓白质面积近颅则有明显的增大,兔的脊髓白质面积近颅侧没有明显的增大。4.一般来说,动物脊髓前角的体积都大于后角,但是人脊髓颈段和胸段前角的体积小于后角。动物脊髓中间带的体积比人的大。5.人脊髓白质后索的面积比前索面积大,但是兔脊髓白质后索的面积比前索面积小。我们发现人和猫的灰质向前移动是动物进化在脊髓的标志。可能在神经解剖和神经生理实验方面猫的脊髓是比较满意的实验对象。
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THE COMPARISON OF THE CROSS-SECTION AREA AND VOLUME OF THE GRAY AND WHITE SUBSTANCE OF THE SPINAL CORD IN MAN CAT DOG AND RABBIT |
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| Abstract: | The spinal cords of three men, nine cats, three dogs and four rabbits were chosen for the present investigation. It was found that the thoracic segment of the spinal cord is longer than the other segments in man and animals. The volume of the gray substance in the lumber enlargment are larger than that in the cervical enlargment in man, cat, dog and rabbit, The cross—section areas of the white substance of the spinal cord in man increase clearly at the cranial level but that of the rabbit does not.Based on the measurements we found that the move of the gray substance anteriorly in man and cat may be the mark of evolution of the mammals. Perheps the spinal eord of eat is a satisfectory specimen in neuro anatomical and neurophysiological laboratory. |
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