King A J, Johnson M S
Proc R Soc Lond B Biol Sci. 1985 Jul 22;225(1238):129-46. doi: 10.1098/rspb.1985.0055.
An evoked potential consisting of four postsynaptic components was recorded in the guinea-pig superior colliculus following electrical stimulation of the contralateral optic nerve. This potential was generated in response to the activation of four populations of optic nerve fibres with different conduction velocities. Current source-density analysis revealed that the two slower conducting fibre populations synapse in the upper third of the stratum griseum superficiale on dendrites whose cell bodies appear to be found in the lower part of this layer and in the stratum opticum. The two faster conducting populations synapse deeper, near the border of the stratum griseum superficiale and stratum opticum, on neurons with cell bodies that may lie towards the upper part of the stratum griseum superficiale. The locations of these postsynaptic sites correspond to the layers in which the optic nerve terminates as revealed by neuroanatomical tracing techniques. Furthermore, neurons of the shape and orientation predicted by the current source-density analysis were found in the superficial layers by using the Golgi-Cox technique.
在对豚鼠对侧视神经进行电刺激后，在其 superior colliculus 中记录到了一个由四个突触后成分组成的诱发电位。该电位是由具有不同传导速度的四群视神经纤维的激活所产生的。电流源密度分析显示，两个传导速度较慢的纤维群在浅灰质层上三分之一处与树突形成突触，这些树突的细胞体似乎位于该层下部和视层中。两个传导速度较快的纤维群在浅灰质层和视层边界附近较深处与细胞体可能位于浅灰质层上部的神经元形成突触。这些突触后位点的位置与神经解剖追踪技术所揭示的视神经终止层相对应。此外，通过使用 Golgi-Cox 技术，在表层中发现了电流源密度分析所预测的形状和方向的神经元。
