猫Darkschewitsch氏核向大脑皮质的投射——HRP逆轴突传递法研究

THE PROJECTIONS FROM THE NUCLEUS OF DARKSCHEWITSCH TO THE CEREBRAL CORTEX IN CATS: DEMONSTRATED BY THE METHOD OF RETROGRADE TRANSPORT OF HORSERADISH PEROXIDASE

本文用HRP逆行传递法研究了猫中脑Darkschewitsch氏核(DK)向大脑皮质的投射,观察了起源细胞的形态和分布。实验证明DK仅投向前、后乙状回(感觉运动皮质),其余各脑回或机能区均不接受DK的投射;DK只投向感觉运动皮质的前肢区,而不投向后肢区和面区。标记细胞以中等大小的卵圆形、梭形和三角形为主,散在分布于同侧DK的全长,对侧几乎无标记。核的吻段较尾段的标记细胞多。

The projections from the nucleus of Darkschewitsch(DK)in mesencephalon to the cerebral cortex in the cat were studied using the method of retrograde transport of horseradish peroxidase(HRP),and the shapes and the distribution of the originating cells were observed.The experiments show that DK projects solely to the anterior and posterior sigmoid gyri(the sensory and motor areas of the cerebral cortex);other gyri or functional areas receive no fibres from DK.However,DK projects fibres only to the forelimb area of the sensory and motor areas,and not to the hindlimb and facial areas.The labelled cells are mainly of medium size and of three different shapes:oval,fusiform and triangular They are scattered along the whole length of ipsilateral DK.Contralateral DK contains almost no labelled cell.The labelled ceils in the rostral part of the nucleus are more numerous than those in the caudal.