Barraclough, Nick E., Tinsley, Chris J., Webb, Ben S., Vincent, Christopher J., Derrington, Andrew M. (2006) Processing of first-order motion in marmoset visual cortex is influenced by second-order motion. Visual Neuroscience, 23 (5). pp. 815-824. ISSN 0952-5238. (doi:10.1017/S0952523806230141) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:4134)
The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. | |
Official URL: http://dx.doi.org/10.1017/S0952523806230141 |
Abstract
Moving first-order stimuli and to combined first- and second-order stimuli in order to determine whether first-order motion processing was influenced by second-order motion. Beat stimuli were made by summing two gratings of similar spatial frequency, one of which was static and the other was moving. The beat is the product of a moving sinusoidal carrier (first-order motion) and a moving low-frequency contrast envelope (second-order motion). We compared responses to moving first-order gratings alone with responses to beat patterns with first-order and second-order motion in the same direction as each other, or in opposite directions to each other in order to distinguish first-order and second-order direction-selective responses. In the majority (72%, 67/93) of cells (V1 73%, 45/62; V2 70%, 16/23; third visual complex 75%, 6/8), responses to first-order motion were significantly influenced by the addition of a second-order signal. The second-order envelope was more influential when moving in the opposite direction to the first-order stimulus, reducing first-order direction sensitivity in V1, V2, and the third visual complex. We interpret these results as showing that first-order motion processing through early visual cortex is not separate from second-order motion processing; suggesting that both motion signals are processed by the same system.
Item Type: | Article |
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DOI/Identification number: | 10.1017/S0952523806230141 |
Uncontrolled keywords: | primate; physiology; V1; luminance; contrast |
Subjects: | B Philosophy. Psychology. Religion > BF Psychology |
Divisions: | Divisions > Division of Human and Social Sciences > School of Psychology |
Depositing User: | Rosalind Beeching |
Date Deposited: | 02 Jun 2008 13:53 UTC |
Last Modified: | 16 Nov 2021 09:42 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/4134 (The current URI for this page, for reference purposes) |
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