neural behaviour of rabbit's hippocampus

ABSTRACT

The influence of photic stimuli of different frequencies ranging from 150 to 1800 F/min were employed to investigate the neural behaviour of the rabbit's hippocampus. The EEG activities of the hipo-campa region CA1, which consist of alpha, beta, gamma, delta, kappa and theta waves, were analyzed by digital PDP-11 computer and analogue to digital convener. The lowest frequency of peak value of the power spectra before the effect of stimulation was found to be 0.85 Hz [delta waves]. Theta waves of frequency ranging from 3.96 to 6.79 Hz were the dominated EEC signals after stimulation. The coherence factor, which is a mea sure of the hippocampal activity, increased by greater frequency of stimulation. The max. value of the coherence was observed to be 0.5 at 1200 F/min