Global motion integration in the postero-medial part of the lateral suprasylvian cortex in the cat

Experimental Brain Research
M Y VilleneuveC Casanova

Abstract

In cats, the postero-medial part of lateral suprasylvian cortex (PMLS) is generally considered a key area for motion processing. While behavioral studies have indeed supported the role of PMLS cortex in higher order motion integration (Cereb Cortex 6:814-822, 1996), there is no evidence that individual PMLS cells can perform such analysis (Vis Neurosci 5:463-468, 1990; J Neurophysiol 63:1529-1543, 1990). Given the fundamental importance of understanding the neural substrate subtending higher order motion processing, we investigated whether PMLS neurons can signal the direction of motion of complex random dot kinematograms (RDKs) wherein comprising elements do not provide any local coherent motion cues. Results indicated that most PMLS cells (82%) can integrate the displacement of individual elements into a global motion percept. Their large receptive fields allowed the integration of motion for elements separated by large spatial intervals (up to 4 degrees ). In most cases, the analysis of complex RDK motion necessitated the contribution of the area of the visual field beyond the classical receptive field. None of the complex RDK-sensitive cells were found to be pattern-motion selective when tested with plaid patterns. Our resu...Continue Reading

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Citations

Jul 4, 2006·Experimental Brain Research·Brian G Ouellette, Christian Casanova
May 13, 2010·Experimental Brain Research·R J RushmoreAntoni Valero-Cabre
Jan 1, 2010·Sensors·Alice RokszinAttila Nagy
Jan 7, 2016·Cerebral Cortex·L Bussières, C Casanova
Mar 17, 2009·Current Biology : CB·Donald E MitchellDiane Kung
Sep 8, 2006·The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry·Manuel F Casanova
Aug 20, 2009·Experimental Brain Research·Charles SpenceBrigitte Röder
Mar 4, 2014·PloS One·Martha M ShiellRobert J Zatorre

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