Harmonic Oscillation as Model for Cortical Excitability Changes with Attention in Cats

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Abstract
A single shock to the prepyriform cortex with implanted electrodes caused a damped, sinusoidal oscillation in potential. The root-mean-square amplitudes of potentials evoked by short trains of stimuli, when plotted against the frequency of stimulation, fitted the equation for forced harmonic oscillation when the cat was attentive to the stimuli.