Destruction of the occipital cortex presumably leads to permanent blindness in the contralateral visual field. Residual abilities to respond to visual stimuli in the blind field without consciously experiencing them have, however, been described in cortically blind patients and are termed 'blindsight'. Although the neuronal basis of blindsight remains unknown, possible neuronal correlates have ...

Encephalotrigeminal angiomatosis or SturgeWeber's disease is an uncommon congenital disorder which can vary greatly in the extent of its manifestations, but which in severe cases can lead to infantile hemiplegia associated with fits, behavioural disorders and mental backwardness. Until comparatively recently specific therapy was largely limited to anticonvulsant drugs. Only a few isolated repor...

Patients with cortical blindness following a lesion to the primary visual cortex (V1) may retain nonconscious visual abilities (blindsight). One intriguing, though largely unexplored question, is whether nonconscious vision in the blind hemifield of hemianopic patients can be sensitive to higher-order perceptual organization, and which V1-independent structure underlies such effect. To answer t...