The Effects of Ablation of Visual Cortical Areas on the CFF of the Electroretinogram of the Cat

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Abstract
The effect of ablation of visual cortical areas on the electroretinographic critical flicker fusion frequency (CFF) was studied in unanaesthetized, paralysed cats. Bilateral ablation of the visual area of the suprasylvian sulcus severely depressed the photopic part of the CFF curve, while leaving the scotopic part unaltered. Bilateral ablation of the striate, parastriate and peristriate areas did not have any influence on the CFF curve. The visual area in the suprasylvian sulcus is considered to play a crucial role in the system of centrifugal control of retinal function. The possibility of a homologous area in the monkey and human brain is discussed.

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