scholarly journals Baseline fMRI pattern activity in early visual cortex predicts the initial dominant percept in subsequent binocular rivalry

2010 ◽  
Vol 10 (7) ◽  
pp. 356-356
Author(s):  
P.-J. Hsieh ◽  
J. Colas ◽  
N. Kanwisher
Keyword(s):  
Visual Cortex ◽  
Binocular Rivalry ◽  
Early Visual Cortex

scholarly journals Early cross-modal interactions and adult human visual cortical plasticity revealed by binocular rivalry

2015 ◽  
Author(s):  
Claudia Lunghi
Keyword(s):  
Visual Cortex ◽  
Binocular Rivalry ◽  
Visual Processing ◽  
Cortical Plasticity ◽  
Monocular Deprivation ◽  
Homeostatic Plasticity ◽  
Multisensory Perception ◽  
Modal Interactions ◽  
Early Visual Cortex ◽  
Visual Cortical

In this research binocular rivalry is used as a tool to investigate different aspects of visual and multisensory perception. Several experiments presented here demonstrated that touch specifically interacts with vision during binocular rivalry and that the interaction likely occurs at early stages of visual processing, probably V1 or V2. Another line of research also presented here demonstrated that human adult visual cortex retains an unexpected high degree of experience-dependent plasticity by showing that a brief period of monocular deprivation produced important perceptual consequences on the dynamics of binocular rivalry, reflecting a homeostatic plasticity. In summary, this work shows that binocular rivalry is a powerful tool to investigate different aspects of visual perception and can be used to reveal unexpected properties of early visual cortex.

scholarly journals Surface Area of Early Visual Cortex Predicts Individual Speed of Traveling Waves During Binocular Rivalry

2013 ◽  
Vol 25 (6) ◽  
pp. 1499-1508 ◽  
Author(s):  
Erhan Genç ◽  
Johanna Bergmann ◽  
Wolf Singer ◽  
Axel Kohler
Keyword(s):  
Visual Cortex ◽  
Surface Area ◽  
Traveling Waves ◽  
Binocular Rivalry ◽  
Early Visual Cortex

Activity changes in early visual cortex reflect monkeys' percepts during binocular rivalry

Nature ◽  
1996 ◽  
Vol 379 (6565) ◽  
pp. 549-553 ◽  
Author(s):  
David A. Leopold ◽  
Nikos K. Logothetis
Keyword(s):  
Visual Cortex ◽  
Binocular Rivalry ◽  
Early Visual Cortex

scholarly journals Binocular rivalry from invisible patterns

2016 ◽  
Vol 113 (30) ◽  
pp. 8408-8413 ◽  
Author(s):  
Jinyou Zou ◽  
Sheng He ◽  
Peng Zhang
Keyword(s):  
Visual Cortex ◽  
Binocular Rivalry ◽  
Selective Adaptation ◽  
Uniform Field ◽  
Tilt Aftereffect ◽  
Interocular Suppression ◽  
Low Contrast ◽  
Frontoparietal Cortex ◽  
Early Visual Cortex ◽  
The Invisible

Binocular rivalry arises when incompatible images are presented to the two eyes. If the two eyes’ conflicting features are invisible, leading to identical perceptual interpretations, does rivalry competition still occur? Here we investigated whether binocular rivalry can be induced from conflicting but invisible spatial patterns. A chromatic grating counterphase flickering at 30 Hz appeared uniform, but produced significant tilt aftereffect and orientation-selective adaptation. The invisible pattern also generated significant BOLD activities in the early visual cortex, with minimal response in the parietal and frontal cortical areas. Compared with perceptually matched uniform stimuli, a monocularly presented invisible chromatic grating enhanced the rivalry competition with a low-contrast visible grating presented to the other eye. Furthermore, switching from a uniform field to a perceptually matched invisible chromatic grating produced interocular suppression at approximately 200 ms after onset of the invisible grating. Experiments using briefly presented monocular probes revealed evidence for sustained rivalry competition between two invisible gratings during continuous dichoptic presentations. These findings indicate that even without visible interocular conflict, and with minimal engagement of frontoparietal cortex and consciousness related top-down feedback, perceptually identical patterns with invisible conflict features produce rivalry competition in the early visual cortex.

scholarly journals Decoding the future from past experience: learning shapes predictions in early visual cortex

2015 ◽  
Vol 113 (9) ◽  
pp. 3159-3171 ◽  
Author(s):  
Caroline D. B. Luft ◽  
Alan Meeson ◽  
Andrew E. Welchman ◽  
Zoe Kourtzi
Keyword(s):  
Visual Cortex ◽  
Large Scale ◽  
Sequence Structure ◽  
Neural Populations ◽  
Early Visual Cortex ◽  
Temporal Structures ◽  
Future Events ◽  
Sensory Predictions ◽  
Actual Stimulus ◽  
The Brain

Learning the structure of the environment is critical for interpreting the current scene and predicting upcoming events. However, the brain mechanisms that support our ability to translate knowledge about scene statistics to sensory predictions remain largely unknown. Here we provide evidence that learning of temporal regularities shapes representations in early visual cortex that relate to our ability to predict sensory events. We tested the participants' ability to predict the orientation of a test stimulus after exposure to sequences of leftward- or rightward-oriented gratings. Using fMRI decoding, we identified brain patterns related to the observers' visual predictions rather than stimulus-driven activity. Decoding of predicted orientations following structured sequences was enhanced after training, while decoding of cued orientations following exposure to random sequences did not change. These predictive representations appear to be driven by the same large-scale neural populations that encode actual stimulus orientation and to be specific to the learned sequence structure. Thus our findings provide evidence that learning temporal structures supports our ability to predict future events by reactivating selective sensory representations as early as in primary visual cortex.

scholarly journals Reinstatement of Associative Memories in Early Visual Cortex Is Signaled by the Hippocampus

2014 ◽  
Vol 34 (22) ◽  
pp. 7493-7500 ◽  
Author(s):  
S. E. Bosch ◽  
J. F. M. Jehee ◽  
G. Fernandez ◽  
C. F. Doeller
Keyword(s):  
Visual Cortex ◽  
Associative Memories ◽  
Early Visual Cortex
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