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Online tracking of the contents of conscious perception using real-time fMRI

Christoph Reichert, Robert Fendrich, Johannes Bernarding, Claus Tempelmann, Hermann Hinrichs, Jochem W. Rieger
2014 Frontiers in Neuroscience  
During integrated object percepts, brain activity decreases in early sensory areas and increases in higher-tier areas.  ...  categorically different conscious object percepts.  ...  Online-classification Online analysis is the ultimate test of the ability to track the phenomenal content of ambiguous perception time resolved from BOLD-activations.  ... 
doi:10.3389/fnins.2014.00116 pmid:24904260 pmcid:PMC4033165 fatcat:5g3ospbxjfechkqgjfyjpkmczu

Prior Knowledge about Objects Determines Neural Color Representation in Human Visual Cortex

A. R. E. Vandenbroucke, J. J. Fahrenfort, J. D. I. Meuwese, H. S. Scholte, V. A. F. Lamme
2014 Cerebral Cortex  
This shift of neural response for the ambiguous color did not occur for nonsense objects.  ...  For example, we perceive color and not wavelength information, and this in part depends on our past experience with colored objects (Hansen et al. 2006; Mitterer and de Ruiter 2008) .  ...  We thank Jasper Wijnen for programming the experimental task. We thank Gijs Brouwer for his helpful comments on data analyses. Conflict of Interest: None declared.  ... 
doi:10.1093/cercor/bhu224 pmid:25323417 fatcat:5at2cdrk7rhexb3zvynhwlnd7a

Ambiguity of 'Ambiguity'

Richard L Gregory
2000 Perception  
Would exploring this further lead to insights relating language and perception, perhaps suggesting that language originally derived from ancient pre-human perceptual classifications of objects and actions  ...  This is the underlying question ölinking language and perception. Active ambiguity ö evoking alternative meanings Some sentences have sharply different meanings which`flip'.  ... 
doi:10.1068/p2910ed pmid:11220206 fatcat:xm5y2vweh5hpxi7rzno652ayf4

Artificial neural network detects human uncertainty

Alexander E. Hramov, Nikita S. Frolov, Vladimir A. Maksimenko, Vladimir V. Makarov, Alexey A. Koronovskii, Juan Garcia-Prieto, Luis Fernando Antón-Toro, Fernando Maestú, Alexander N. Pisarchik
2018 Chaos  
In this research, we use the ANN approach to classify bistable brain states which occur during the perception of an ambiguous visual object.  ...  However, despite significant achievements of artificial intelligence in recognition and classification of well-reproducible patterns of neural activity, the use of ANNs for recognition and classification  ...  ACKNOWLEDGMENTS We would like to express our gratitude to the Reviewers for comments and suggestions that have improved the article. This work has been supported by Russian Science Foundation  ... 
doi:10.1063/1.5002892 pmid:29604631 fatcat:icesyh5cuvb2zi77yltgyuhzwa

The Representation of Behavioral Choice for Motion in Human Visual Cortex

J. T. Serences, G. M. Boynton
2007 Journal of Neuroscience  
Single-unit recording studies have demonstrated a close link between neural activity in the middle temporal (MT) area and motion perception.  ...  Our goal was to determine how these direction-selective response patterns directly relate to the conscious perception of motion.  ...  Classification accuracy for unambiguous-and ambiguous-motion stimuli.  ... 
doi:10.1523/jneurosci.4021-07.2007 pmid:18032662 pmcid:PMC6673290 fatcat:trdf4lkrszetjf2v6of4nmwuby

Classifying the Perceptual Interpretations of a Bistable Image Using EEG and Artificial Neural Networks

Alexander E. Hramov, Vladimir A. Maksimenko, Svetlana V. Pchelintseva, Anastasiya E. Runnova, Vadim V. Grubov, Vyacheslav Yu. Musatov, Maksim O. Zhuravlev, Alexey A. Koronovskii, Alexander N. Pisarchik
2017 Frontiers in Neuroscience  
This may give new directions for future research in the field of cognitive and pathological brain activity, and for the development of brain-computer interfaces.  ...  In order to classify different human brain states related to visual perception of ambiguous images, we use an artificial neural network (ANN) to analyze multichannel EEG.  ...  For a long time, ambiguous images have been research objects for psychologists (Leopold and Logothetis, 1999; Sterzer et al., 2009) .  ... 
doi:10.3389/fnins.2017.00674 pmid:29255403 pmcid:PMC5722852 fatcat:m6n6f363cbcuve6w3p4ge7hqwm

Auditory Cortex Encodes the Perceptual Interpretation of Ambiguous Sound

N. Kilian-Hutten, G. Valente, J. Vroomen, E. Formisano
2011 Journal of Neuroscience  
This does not allow for a differentiation between effects due to acoustic differences (i.e., sensation) and those due to conscious perception.  ...  The confounding of physical stimulus characteristics and perceptual interpretations of stimuli poses a problem for most neuroscientific studies of perception.  ...  In the visual domain, this problem has been tackled using ambiguous stimuli and the phenomenon of multistable perception (for review, see Sterzer et al., 2009 ).  ... 
doi:10.1523/jneurosci.4572-10.2011 pmid:21289180 pmcid:PMC6623724 fatcat:cajdvphy6fb7rmewpur7vpvr2q

Induced neural beta oscillations predict categorical speech perception abilities

Gavin M. Bidelman
2015 Brain and Language  
Our findings demonstrate that in addition to previously observed evoked (phase-locked) correlates of CP, induced brain activity in the b-band codes the ambiguity and strength of categorical speech percepts  ...  Notably, changes in b activity were strongly correlated with the slope of listeners' psychometric identification functions, a measure of the "steepness" of their categorical percept.  ...  Acknowledgments The author thanks Michael Weiss and Joshua Villafuerte for their assistance in collecting the original data for this study.  ... 
doi:10.1016/j.bandl.2014.11.003 pmid:25540857 fatcat:mjpi7jhrtvhptomee6ipd7pisq

Does Unconscious Information Affect Cognitive Activity?: A Study Using Experimental Priming

Margarita G. Filippova
2011 The Spanish Journal of Psychology  
a special decision on non-perception.  ...  for which they serve as a context.  ...  For each image words associated with them were chosen, for the ambiguous images -two words, associated with both their meanings.  ... 
doi:10.5209/rev_sjop.2011.v14.n1.2 fatcat:2ziah7iwm5fpxndevctmf6rh5e

EEG correlates of categorical and graded face perception

Margaret C. Moulson, Benjamin Balas, Charles Nelson, Pawan Sinha
2011 Neuropsychologia  
However, determining the face specificity of any neural marker for face perception hinges on finding an appropriate control stimulus.  ...  to faces, suggesting strict selectivity for veridical face stimuli.  ...  that is not observed for other classes of objects (Rossion et al., 2000) .  ... 
doi:10.1016/j.neuropsychologia.2011.09.046 pmid:22001852 pmcid:PMC3290448 fatcat:rfnz2nx23nd5ndabe2gjk3vm6e

EEG correlates of categorical and graded face perception

M. Moulson, B. Balas, C. Nelson, P. Sinha
2010 Journal of Vision  
However, determining the face specificity of any neural marker for face perception hinges on finding an appropriate control stimulus.  ...  to faces, suggesting strict selectivity for veridical face stimuli.  ...  that is not observed for other classes of objects (Rossion et al., 2000) .  ... 
doi:10.1167/8.6.533 fatcat:kj4h5x6i5vezdcb2svgh7wimty

To Perceive or Not Perceive: The Role of Gamma-band Activity in Signaling Object Percepts

João Castelhano, José Rebola, Bruno Leitão, Eugenio Rodriguez, Miguel Castelo-Branco, Lawrence M. Ward
2013 PLoS ONE  
Modulations in the 30-75 Hz range were larger for perception states. Interestingly, phase synchrony was larger for perception states for high frequency bands.  ...  Using a rapid visual presentation of short-lived Mooney objects we found an increase of gamma-band activity locked to perceptual events.  ...  We would like to thank Britta Graewe for help in some experiments and to thank all the volunteers that participated in this study. We acknowledge the comments of all the reviewers.  ... 
doi:10.1371/journal.pone.0066363 pmid:23785494 pmcid:PMC3681966 fatcat:vll7tpy2kvf77ndoequpybfzsq

Brain-inspired Bayesian perception for biomimetic robot touch

Nathan F. Lepora, J. Charlie Sullivan, Ben Mitchinson, Martin Pearson, Kevin Gurney, Tony J. Prescott
2012 2012 IEEE International Conference on Robotics and Automation  
These are important percepts for manipulating objects -for example, knowing object shape is key for grasping, while the object location is required to position a manipulator.  ...  Errors for shape classification are shown in panel (A) and for head position in panel (B). Fig. 5 . 5 Decision errors for free-response perception.  ... 
doi:10.1109/icra.2012.6224815 dblp:conf/icra/LeporaSMPGP12 fatcat:4huq4dqvzzawdjgxqda5bjcfvy

Material Recognition via Heat Transfer Given Ambiguous Initial Conditions

Tapomayukh Bhattacharjee, Henry M. Clever, Joshua M Wade, Charlie C. Kemp
2021 IEEE Transactions on Haptics  
(i.e., ambiguous initial conditions).  ...  Overall, our work provides insights into challenging conditions for material recognition via heat transfer, and suggests methods by which robots can overcome these challenges.  ...  For example, shape, texture, non-uniform materials, compliance, and object motion could influence human and robot perception [27] , [35] .  ... 
doi:10.1109/toh.2021.3089990 pmid:34133288 fatcat:afmb5chrqzc7lh4nofvm6rsrry

Page 279 of Dsh Abstracts Vol. 14, Issue 2 [page]

1974 Dsh Abstracts  
actors and recipients in passive sentences and reversed active sentences and a classification matrix.  ...  For learning-disabled children, the greatest relative differences were for 3rd person singular, possessives, and adjectival inflections.  ... 
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