Subcortical Projections of Area V2 in the Macaque
Name
Ungerleider-2014-Subcortical Projections.pdf
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1.86 MB
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Author(s)
Ungerleider, Leslie G.
Galkin, Thelma W.
Desimone, Robert
Gattass, Ricardo
Date Issued
June 2014
Journal
Journal of Cognitive Neuroscience
Publisher
MIT Press
Citation
Ungerleider, Leslie G., Thelma W. Galkin, Robert Desimone, and Ricardo Gattass. “Subcortical Projections of Area V2 in the Macaque.” Journal of Cognitive Neuroscience 26, no. 6 (June 2014): 1220–1233.
Version
Final published version
Abstract
To investigate the subcortical efferent connections of visual area V2, we injected tritiated amino acids under electrophysiological control into 15 V2 sites in 14 macaques. The injection sites included the fovea representation as well as representations ranging from central to far peripheral eccentricities in both the upper and lower visual fields. The results indicated that V2 projects topographically to different portions of the inferior and lateral pulvinar and to the superficial and intermediate layers of the superior colliculus. Within the pulvinar, the V2 projections terminated in fields P1, P2, and P4, with the strongest projection being in P2. Central visual field injections in V2 labeled projection zones in P1 and P2, whereas peripheral field injections labeled P1, P2, and P4. No projections were found in P3. Both central and peripheral field injections in V2 projected topographically to the superficial and intermediate layers of the superior colliculus. Projections from V2 to the pulvinar and the superior colliculus constituted cortical–subcortical loops through which circuits serving spatial attention are activated.
MIT Department
McGovern Institute for Brain Research at MIT
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1162/jocn_a_00571
