Visual evoked responses (VER) in four cases of occipital apoplexy supplemented perimetric diagnosis with new electrophysiologic parameters. These included diagnosis of (1) optic radiation involvement by delay in the initial VER component; (2) stirate cortical involvement by obliteration of the initial and late VER components; (3) suprastriate involvement by selective loss of the late VER components, and (4) recovery at one or more of the above levels in the visual process by follow-up examination.

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