Winson J
Brain Res. 1976 Feb 13;103(1):71-9. doi: 10.1016/0006-8993(76)90687-9.
Depth profiles of hippocampal theta rhythm were investigated in the freely moving rabbit during three behavioral conditions: REM sleep, voluntary movement, and during sensory stimulation applied to the motionless animal. Profiles were found to be the same in all three conditions. Dorsoventral microelectrode penetration of the dorsal hippocampus revealed an approximately uniform amplitude of theta rhythm in strata oriens and pyramidal of CA1. Further microelectrode advancement revealed a sharp reversal of phase and a coincident null in amplitude in the proximal stratum radiatum. There was also a peak of theta rhythm amplitude which occurred in the molecular layer of the dorsal blade of the dentate gyrus. These data imply that in the rabbit, as in the freely moving rat, there are two generators of theta rhythm in the dorsal hippocampus, one in the dentate gyrus and the other in the overlying CA1 layer. The data also indicate the existence of a species difference in generating systems between the rabbit and the rat.
在三种行为状态下，对自由活动的兔子海马θ节律的深度分布进行了研究：快速眼动睡眠、自主运动以及对静止动物施加感觉刺激时。发现在这三种状态下分布情况相同。对背侧海马进行背腹向微电极穿刺显示，CA1区的海马伞层和锥体层中θ节律的幅度大致均匀。进一步推进微电极显示，在近端辐射层中相位急剧反转且幅度同时出现零值。在齿状回背叶的分子层中也出现了θ节律幅度的峰值。这些数据表明，在兔子中，与自由活动的大鼠一样，背侧海马中有两个θ节律发生器，一个在齿状回，另一个在上方的CA1层。数据还表明兔子和大鼠在产生系统上存在物种差异。
