Electrical activity of hippocampal neuronal circuit

The synchronous electrical activity of the Rabbit's hippocampus theta rhythm of frequency 4-7 Hz] was investigated by online computer analyses. This rhythm was evoked by electrical stimulation delivered to the Reticular formation. The stimulation process was accomplished by a train of pulses or varied frequency, intensity, and width. A difference in stimulation parameters leads to change of frequency and amplitude for the theta waves. It was found that, the Reticular formation is not only essential for generation of theta waves, but also considered as a controller for the activity of the hippocampus