Cortical areas mediating stereopsis in the human brain: a PET study.
Using PET, we investigated the neural substrates of stereodepth perception in humans. The presentation of Julesz-type random-dot stereograms (RDS) produced significant rCBF elevations in Brodmann areas (BA) 18, 19 and 7, all in the right hemisphere. Activation foci were also found in both middle temporal areas (MT). These results demonstrate that, as in primates, cortical area MT and extrastriate areas are central to stereovision and that a network of predominant right hemispheric regions is recruited to meet visuo-spatial processing demands associated with horizontal binocular disparity inputs.
Fortin
Audrey
A
Ecole d'Optométrie, Université de Montréal, CP 6128, Succursale centre-ville, Montréal Québec Canada H3C 3J7.
Ptito
Alain
A
Faubert
Jocelyn
J
Ptito
Maurice
M
D000328:Adult; D001931:Brain Mapping; D002560:Cerebrovascular Circulation / Q000502:physiology; D003867:Depth Perception / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D010296:Parietal Lobe / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*; D013702:Temporal Lobe / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology*; D014055:Tomography, Emission-Computed; D014793:Visual Cortex / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology*; D014795:Visual Pathways / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology*