Summary
Cortical projections from the contralateral hemisphere to the superior colliculus (SC) were studied in macaque monkey using retrograde transport of the enzyme horseradish peroxidase (HRP). After single or multiple injections of HRP into SC, labelled cells were found contralaterally in layer V of the anterior bank of the arcuate sulcus, the origin of this contralateral projection being confined to the anterior part of Brodmann's area 6. Only a few labelled cells appeared in adjacent area 8. Labelled cells occured in patches, forming bands which were found to run in a ventromedial direction. A similar pattern was seen homotopically in ipsilateral area 6. Thus, this anterior part of area 6 gives rise to a bilateral projection to the SC. The findings emphasize structural differences in a region of the frontal lobe which has been considered functionally uniform as frontal eye field.
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Supported by Deutsche Forschungsgemeinschaft (SFB 50/C6 and Di 212/2)
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Distel, H., Fries, W. Contralateral cortical projections to the superior colliculus in the macaque monkey. Exp Brain Res 48, 157–162 (1982). https://doi.org/10.1007/BF00237210
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DOI: https://doi.org/10.1007/BF00237210