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Neural Correlates of Structure-from-Motion Perception in Macaque V1 and MT

Grunewald, Alexander and Bradley, David C. and Andersen, Richard A. (2002) Neural Correlates of Structure-from-Motion Perception in Macaque V1 and MT. Journal of Neuroscience, 22 (14). pp. 6195-6207. ISSN 0270-6474. PMCID PMC6757912. doi:10.1523/jneurosci.22-14-06195.2002.

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Structure-from-motion (SFM) is the perception of three-dimensional shape from motion cues. We used a bistable SFM stimulus, which can be perceived in one of two different ways, to study how neural activity in cortical areas V1 and MT is related to SFM perception. Monkeys performed a depth-order task, where they indicated in which direction the front surface of a rotating SFM cylinder display was moving. To prevent contamination of the neural data because of eye position effects, all experiments with significant effects of radius, vergence, and velocity were excluded. As expected, the activity of ∼50% of neurons in V1 and ∼80% of neurons in MT is affected by the stimulus. Furthermore, the activity of 20% of neurons in area V1 is modulated with the percept. This proportion is higher in MT, where the activity of >60% of neurons is modulated with the percept. In both areas, this perceptual modulation occurs only in neurons with activity that is also affected by the stimulus. The perceptual modulation is not correlated with neural tuning properties in area V1, but it is in area MT. Together, these results suggest that V1 is not directly involved in the generation of the SFM percept, whereas MT is. The perceptual modulation in V1 may be attributable to top-down feedback from MT.

Item Type:Article
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URLURL TypeDescription CentralArticle
Andersen, Richard A.0000-0002-7947-0472
Additional Information:© 2002 Society for Neuroscience. Beginning six months after publication the Work will be made freely available to the public on SfN’s website to copy, distribute, or display under a Creative Commons Attribution 4.0 International (CC BY 4.0) license ( Received July 1, 2001; revised April 4, 2002; accepted April 5, 2002. This work was supported by the McDonnell-Pew Program in Cognitive Neuroscience and by the National Institutes of Health (National Eye Institute). We thank Greg de Angelis for help in the choice probability analysis.
Funding AgencyGrant Number
McDonnell-Pew Program in Cognitive NeuroscienceUNSPECIFIED
National Eye InstituteUNSPECIFIED
Subject Keywords:visual motion; visual perception; striate cortex; middle temporal; depth-order; rhesus
Issue or Number:14
PubMed Central ID:PMC6757912
Record Number:CaltechAUTHORS:20200401-094955199
Persistent URL:
Official Citation:Neural Correlates of Structure-from-Motion Perception in Macaque V1 and MT. Alexander Grunewald, David C. Bradley, Richard A. Andersen. Journal of Neuroscience 15 July 2002, 22 (14) 6195-6207; DOI: 10.1523/JNEUROSCI.22-14-06195.2002
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102232
Deposited By: Tony Diaz
Deposited On:01 Apr 2020 16:55
Last Modified:16 Nov 2021 18:10

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