Organization of callosal linkages in visual area V2 of macaque monkey. 2000

P L Abel, and B J O'Brien, and J F Olavarria
Department of Psychology, University of Washington, Seattle, Washington 98195-1525, USA.

In visual area V2 of the macaque monkey callosal cells accumulate in finger-like bands that extend 7-8 mm from the V1/V2 border, or approximately half the width of area V2. The present study investigated whether or not callosal connections in area V2 link loci that are located at the same distance from the V1/V2 border in both hemispheres. We analyzed the patterns of retrograde labeling in V2 resulting from restricted injections of fluorescent tracers placed at different distances from the V1/V2 border in contralateral area V2. The results show that varying the distance of V2 tracer injections from the V1/V2 border led to a corresponding variation in the location of labeled callosal cells in contralateral V2. Injections into V2 placed on or close to the V1 border produced labeled cells that accumulated on or close to the V1 border in contralateral V2, whereas injections into V2 placed away from the V1 border produced labeled cells that accumulated mainly away from the V1 border. These results provide evidence that callosal fibers in V2 preferentially link loci that are located at similar distances from the V1/V2 border in both hemispheres. Relating this connectivity pattern to the topographic map of V2 suggests that callosal fibers link topographically mirror-symmetrical regions of V2, i.e., callosal fibers near the V1/V2 border interconnect areas representing visual fields on, or close to, the vertical meridian, whereas callosal connections from regions away from the V1/V2 border interconnect visuotopically mismatched visual fields that extend onto opposite hemifields.

UI MeSH Term Description Entries
D008252 Macaca fascicularis A species of the genus MACACA which typically lives near the coast in tidal creeks and mangrove swamps primarily on the islands of the Malay peninsula. Burmese Long-Tailed Macaque,Crab-Eating Monkey,Cynomolgus Monkey,M. f. aurea,M. fascicularis,Macaca fascicularis aurea,Monkey, Crab-Eating,Monkey, Cynomolgus,Crab-Eating Macaque,Burmese Long Tailed Macaque,Crab Eating Macaque,Crab Eating Monkey,Crab-Eating Macaques,Crab-Eating Monkeys,Cynomolgus Monkeys,Long-Tailed Macaque, Burmese,Macaque, Burmese Long-Tailed,Macaque, Crab-Eating,Monkey, Crab Eating
D008254 Macaca nemestrina A species of the genus MACACA which inhabits Malaya, Sumatra, and Borneo. It is one of the most arboreal species of Macaca. The tail is short and untwisted. M. leonina,Macaca nemestrina leonina,Macaca nemestrina pagensis,Macaca nemestrina siberu,Macaca siberu,Monkey, Pig-Tailed,Pagai Macaque,Pig-Tail Macaque,Pig-Tailed Macaque,Pig-Tailed Monkey,M. pagensis,Macaca pagensis,Monkey, Pigtail,Monkey, Pigtailed,Pigtail Macaque,Macaque, Pagai,Macaque, Pig-Tail,Macaque, Pig-Tailed,Macaque, Pigtail,Monkey, Pig Tailed,Pagai Macaques,Pig Tail Macaque,Pig Tailed Macaque,Pig Tailed Monkey,Pig-Tail Macaques,Pig-Tailed Macaques,Pig-Tailed Monkeys,Pigtail Macaques,Pigtail Monkey,Pigtail Monkeys,Pigtailed Monkey,Pigtailed Monkeys
D009434 Neural Pathways Neural tracts connecting one part of the nervous system with another. Neural Interconnections,Interconnection, Neural,Interconnections, Neural,Neural Interconnection,Neural Pathway,Pathway, Neural,Pathways, Neural
D003337 Corpus Callosum Broad plate of dense myelinated fibers that reciprocally interconnect regions of the cortex in all lobes with corresponding regions of the opposite hemisphere. The corpus callosum is located deep in the longitudinal fissure. Interhemispheric Commissure,Neocortical Commissure,Callosum, Corpus,Callosums, Corpus,Commissure, Interhemispheric,Commissure, Neocortical,Commissures, Interhemispheric,Commissures, Neocortical,Corpus Callosums,Interhemispheric Commissures,Neocortical Commissures
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014793 Visual Cortex Area of the OCCIPITAL LOBE concerned with the processing of visual information relayed via VISUAL PATHWAYS. Area V2,Area V3,Area V4,Area V5,Associative Visual Cortex,Brodmann Area 18,Brodmann Area 19,Brodmann's Area 18,Brodmann's Area 19,Cortical Area V2,Cortical Area V3,Cortical Area V4,Cortical Area V5,Secondary Visual Cortex,Visual Cortex Secondary,Visual Cortex V2,Visual Cortex V3,Visual Cortex V3, V4, V5,Visual Cortex V4,Visual Cortex V5,Visual Cortex, Associative,Visual Motion Area,Extrastriate Cortex,Area 18, Brodmann,Area 18, Brodmann's,Area 19, Brodmann,Area 19, Brodmann's,Area V2, Cortical,Area V3, Cortical,Area V4, Cortical,Area V5, Cortical,Area, Visual Motion,Associative Visual Cortices,Brodmanns Area 18,Brodmanns Area 19,Cortex Secondary, Visual,Cortex V2, Visual,Cortex V3, Visual,Cortex, Associative Visual,Cortex, Extrastriate,Cortex, Secondary Visual,Cortex, Visual,Cortical Area V3s,Extrastriate Cortices,Secondary Visual Cortices,V3, Cortical Area,V3, Visual Cortex,V4, Area,V4, Cortical Area,V5, Area,V5, Cortical Area,V5, Visual Cortex,Visual Cortex Secondaries,Visual Cortex, Secondary,Visual Motion Areas
D014794 Visual Fields The total area or space visible in a person's peripheral vision with the eye looking straightforward. Field, Visual,Fields, Visual,Visual Field

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