Normal retinotopic mapping in human strabismus with anomalous retinal correspondence.
Burian proposed that a functional retinotopic remapping of the deviated eye on striate visual cortex may be the physiologic basis for the perceptual phenomenon of anomalous retinal correspondence (ARC) in human strabismus. This investigation searched for this type of retinotopic remapping in five esotropes and one exotrope with ARC by means of visual evoked potential (VEP) topographic mapping. Uniocular stimulation of the foveas (corresponding points) during binocular vision in a normal subject yielded identical VEP scalp topographies from each eye. Stimulation of anomalously corresponding points produced different VEP scalp topographies from each eye in the six strabismic subjects. Uniocular stimulation of the anatomic foveas of each eye (noncorresponding points) in a strabismic subject during binocular vision produced identical VEP scalp topographies. These results suggest that there is no significant functional binocular realignment of retinotopic mapping in the visual cortex of human strabismics with ARC.
McCormack
G
G
New England College of Optometry, Boston, Massachusetts 02115.
D001931:Brain Mapping; D004948:Esotropia / Q000503:physiopathology; D005074:Evoked Potentials, Visual; D005099:Exotropia / Q000503:physiopathology; D005403:Fixation, Ocular; D006801:Humans; D013285:Strabismus / Q000503:physiopathology*; D015348:Vision, Binocular; D014792:Visual Acuity; D014793:Visual Cortex / Q000503:physiopathology*