ELECTROPHYSIOLOGY OF LIMBIC NEURONS

海马旁区（下托，前下托， 后下托、下托旁、内嗅皮层和嗅周皮层）将 在自由活动的大鼠中记录。 一个基于电视计算机的系统将 被开发来测量作为头部方向的函数的神经元的放电， 位置和头部方向，位置和速度，头部从侧面转动 侧移，头部抬高和俯仰。 控制这些的刺激 将研究放电的空间感觉-行为相关性。 开火 不同的环境将被研究，寻找跨 环境，以及这些恒定性可能被破坏的方式。 神经元投射的电生理学研究将 被制造。 慢波θ节律与细胞放电的关系 将研究θ节律。

Single neurons in the parahippocampal region (subiculum, presubiculum, postsubiculum, parasubiculum, entorhinal cortex and perirhinal cortex) will be recorded in freely moving rats. A TV-computer based system will be developed to measure firing of a neuron as a function of head direction, place and head direction, place, and speed, turning of the head from side to side, and head elevation and pitch. The stimuli which control these spatial sensory-behavioral correlates of firing will be studied. Firing in different environments will be studied looking for constancies across environments, and ways in which these constancies can be disrupted. Electrophysiological studies of the projections of the neurons studied will be made. The slow wave theta rhythm and the relation of cell firing to the theta rhythm will be studied.