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. 1992 Apr 1;89(7):2595–2599. doi: 10.1073/pnas.89.7.2595

First-order analysis of optical flow in monkey brain.

G A Orban 1, L Lagae 1, A Verri 1, S Raiguel 1, D Xiao 1, H Maes 1, V Torre 1
PMCID: PMC48708  PMID: 1557363

Abstract

Optical flow is a rich source of information about the three-dimensional motion and structure of the visual environment. Little is known of how the brain derives this information. One possibility is that it analyzes first-order elementary components of optical flow, such as expansion, rotation, and shear. Using a combination of physiological recordings and modeling techniques, we investigated the contribution of the middle superior temporal area (MST), a third-order cortical area in the dorsal visual pathway that receives inputs from the medial temporal area (MT). The results show (i) that MST cells, but not MT cells, are selective for elementary flow components (EFCs) alone or their combination with translation, (ii) that MST cells selective for an EFC do not extract this component from a more complex motion pattern, and (iii) that position invariance as observed in MST is compatible with an input arrangement from MT cells matching the selectivity of MST neurons.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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