Haschke R, Dove A, Dove U
Acta Biol Med Ger. 1979;38(4):587-600.
Photically evoked potentials were recorded from the visual cortex (VC) as well as CA 1/2- and CA 4/Fascia dentata-region of the dorsal hippocampus in alert resting rabbits. Analysing the whole time-course of the individual hippocampal EP attention was focused on components corresponding in time to the late negative complex of the cortical EP. Enhancement of such components was seen following habituation to repeated flashes. These changes occurred concerning components in the CA 4/FD-record with shorter latency. The duration and peak latency, however, was longer in CA 4/FD than in the other records. During stimulation of the medial septal nucleus a diminution of late EP-components was seen in the visual cortex and less pronounced in the hippocampus. The time-course of the changes was almost the same in VC and CA 4/FD, whereas in CA 1/2 later components were affected. RF-stimulation caused very similar changes, while those in hippocampal EP's were extended up to later components. Whereas the time range of changes in the hippocampal EP's to all influences under investigation was almost the same, in the VC by RF-stimulation in contrast to habituation components with shorter latencies were affected. In this way it is supposed that for the VC different processes are affected by the three influences, while this could not be established for the hippocampus.
在警觉的静息家兔中，记录视觉皮层（VC）以及背侧海马CA 1/2区和CA 4/齿状回区的光诱发电位。分析单个海马诱发电位的整个时间进程时，重点关注与皮层诱发电位晚期负复合波在时间上相对应的成分。在适应重复闪光后，观察到这些成分增强。这些变化发生在CA 4/FD记录中潜伏期较短的成分上。然而，CA 4/FD中的持续时间和峰值潜伏期比其他记录中的更长。在内侧隔核刺激期间，视觉皮层中晚期诱发电位成分减少，海马中的减少则不太明显。VC和CA 4/FD中变化的时间进程几乎相同，而CA 1/2中较晚的成分受到影响。射频刺激引起非常相似的变化，而海马诱发电位中的变化扩展到较晚的成分。虽然海马诱发电位对所有研究影响的变化时间范围几乎相同，但在VC中，与适应相比，射频刺激影响潜伏期较短的成分。由此推测，对于VC，三种影响作用于不同的过程，而对于海马则无法确定这一点。
