[Effect of callosotomy on frequency characteristics of neuronal activity in the parastriate cortex]

In acute experiments on anesthetized cats, neuronal activity in the parastriate cortex was studied. Character of distribution of the firing rate mean frequency and the total energy of firing during mono- and binocular stimulation prior to (89 neurons) and after (67 neurons) callosotomy, were estimated. The spontaneous neuronal activity prior to callosotomy was found to be much higher than after it. The light stimulation in intact corpus callosum enlarged the range of frequencies of the neuronal activity. During the stimulation, activity of the majority of neurons was focused in a narrow frequency range, i.e. the synchronization occurred. The total energy of neuronal reactions in intact corpus callosum was higher than after callosotomy. The relative reactivity of the neurons was increased after callosotomy.