Dr Marios Philiastides

  • Reader (Centre for Cognitive Neuroimaging)

telephone: 01413304774
email: Marios.Philiastides@glasgow.ac.uk

CONSULTATION HOURS: Thu 1-3pm

Research interests

Our group is interested in characterising the neural correlates of perceptual and value-based decision making in humans, including reinforcement-guided learning and reward-related activity in the dopaminergic system. The computational techniques used in our lab are motivated by classical problems in signal processing, machine learning and statistical pattern recognition. Our ultimate goal is to go beyond mere "brain mapping" and begin looking for distributed neural representations to decipher how information flow through a "network" can lead to changes in behaviour. To this end we use a multimodal approach, which combines various forms of neuroimaging (EEG/MEG, fMRI, simultaneous EEG-fMRI & EEG-pupilometry) and interventional techniques (TMS/tDCS) along with computational modelling and multivariate data analysis techniques to expose the relevant brain networks and their underlying computations.

Lab Website: http://mphiliastides.org


Publications

List all by: Type | Date

Jump to: 2017 | 2016 | 2015 | 2014 | 2013 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005
Number of items: 27.

2017

Fouragnan, E., Queirazza, F., Retzler, C., Mullinger, K. J. and Philiastides, M. G. (2017) Spatiotemporal neural characterization of prediction error valence and surprise during reward learning in humans. Scientific Reports, 7, 4762. (doi:10.1038/s41598-017-04507-w) (PMID:28684734)

Pisauro, M. A., Fouragnan, E., Retzler, C. and Philiastides, M. G. (2017) Neural correlates of evidence accumulation during value-based decisions revealed via simultaneous EEG-fMRI. Nature Communications, 8, 15808. (doi:10.1038/ncomms15808) (PMID:28598432)

Kayser, S. J., Philiastides, M. G. and Kayser, C. (2017) Sounds facilitate visual motion discrimination via the enhancement of late occipital visual representations. NeuroImage, 148, pp. 31-41. (doi:10.1016/j.neuroimage.2017.01.010) (PMID:28082107) (PMCID:PMC5349847)

Diaz, J. A., Queirazza, F. and Philiastides, M. G. (2017) Perceptual learning alters post-sensory processing in human decision making. Nature Human Behaviour, 1, 0035. (doi:10.1038/s41562-016-0035)

2016

Delis, I., Onken, A., Schyns, P. G., Panzen, S. and Philiastides, M. (2016) Space-by-time non-negative matrix factorization for single-trial decoding of M/EEG activity. NeuroImage, 133, pp. 504-515. (doi:10.1016/j.neuroimage.2016.03.043) (PMID:27033682) (PMCID:PMC4907687)

2015

Fouragnan, E., Retzler, C., Mullinger, K. and Philiastides, M. G. (2015) Two spatiotemporally distinct value systems shape reward-based learning in the human brain. Nature Communications, 6, 8107. (doi:10.1038/ncomms9107) (PMID:26348160) (PMCID:PMC4569710)

Gherman, S. and Philiastides, M. G. (2015) Neural representations of confidence emerge from the process of decision formation during perceptual choices. NeuroImage, 106, pp. 134-143. (doi:10.1016/j.neuroimage.2014.11.036)

2014

Philiastides, M., Heekeren, H. and Sajda, P. (2014) Human scalp potentials reflect a mixture of decision-related signals during perceptual choices. Journal of Neuroscience, 34(50), pp. 16877-16889. (doi:10.1523/JNEUROSCI.3012-14.2014) (PMID:25505339) (PMCID:PMC4261107/)

Lou, B., Li, Y., Philiastides, M. G. and Sajda, P. (2014) Prestimulus alpha power predicts fidelity of sensory encoding in perceptual decision making. NeuroImage, 87, pp. 242-251. (doi:10.1016/j.neuroimage.2013.10.041) (PMID:24185020) (PMCID:PMC3946902)

2013

Blank, H., Guido, B., Heekeren, H.R. and Philiastides, M.G. (2013) Temporal characteristics of the influence of punishment on perceptual decision making in the human brain. Journal of Neuroscience, 33(9), pp. 3939-3952. (doi:10.1523/JNEUROSCI.4151-12.2013)

Filimon, F., Philiastides, M.G., Nelson, J.D., Kloosterman, N.A. and Heekeren, H.R. (2013) How embodied is perceptual decision making? Evidence for separate processing of perceptual and motor decisions. Journal of Neuroscience, 33(5), pp. 2121-2136. (doi:10.1523/JNEUROSCI.2334-12.2013)

Philiastides, M.G. and Ratcliff, R. (2013) Influence of branding on preference-based decision making. Psychological Science, 24(7), pp. 1208-1215. (doi:10.1177/0956797612470701)

2011

Philiastides, M., Auksztulewicz, R., Heekeren, H. and Blankenburg, F. (2011) Causal role of dorsolateral prefrontal cortex in human perceptual decision making. Current Biology, 21(11), pp. 980-983. (doi:10.1016/j.cub.2011.04.034)

Sajda, P., Philiastides, M., Heekeren, H. and Ratcliff, R. (2011) Linking neuronal variability to perceptual decision making via neuroimaging. In: Glanzman, D. and Ding, M. (eds.) The Dynamic Brain: An Exploration of Neuronal Variability and its Functional Significance. Oxford University Press, pp. 214-232. ISBN 9780195393798 (doi:10.1093/acprof:oso/9780195393798.001.0001)

2010

Philiastides, M. G., Biele, G., Vavatzanidis, N., Kazzer, P. and Heekeren, H. R. (2010) Temporal dynamics of prediction error processing during reward-based decision making. NeuroImage, 53(1), pp. 221-232. (doi:10.1016/j.neuroimage.2010.05.052) (PMID:20510376)

Philiastides, M., Biele, G. and Heekeren, H. (2010) A mechanistic account of value computation in the human brain. Proceedings of the National Academy of Sciences of the United States of America, 107(20), pp. 9430-9435. (doi:10.1073/pnas.1001732107)

2009

Goldman, R. I., Wei, C.-Y., Philiastides, M. G., Gerson, A. D., Friedman, D., Brown, T. R. and Sajda, P. (2009) Single-trial discrimination for integrating simultaneous EEG and fMRI: Identifying cortical areas contributing to trial-to-trial variability in the auditory oddball task. NeuroImage, 47(1), pp. 136-147. (doi:10.1016/j.neuroimage.2009.03.062) (PMID:19345734) (PMCID:PMC2789455)

Philiastides, M. and Heekeren, H. (2009) Spatiotemporal characteristics of perceptual decision making in the human brain. In: Dreher, J.-C. and Tremblay, L. (eds.) Handbook of Reward and Decision Making. Academic Press: Burlington, pp. 185-212. ISBN 9780123746207 (doi:10.1016/B978-0-12-374620-7.00008-X)

Ratcliff, R., Philiastides, M. and Sajda, P. (2009) Quality of evidence for perceptual decision making is indexed by trial-to-trial variability of the EEG. Proceedings of the National Academy of Sciences of the United States of America, 106(16), pp. 6539-6544. (doi:10.1073/pnas.0812589106)

Sajda, P., Philiastides, M.G. and Parra, L. (2009) Single-trial analysis of neuroimaging data: inferring neural networks underlying perceptual decision-making in the human brain. IEEE Reviews in Biomedical Engineering, 2, pp. 97-109.

2008

Parra, L., Christoforou, C., Gerson, A., Dyrholm, M., Luo, A., Wagner, M., Philiastides, M.G. and Sajda, P. (2008) Spatiotemporal linear decoding of brain state: application to performance augmentation in high-throughput tasks. IEEE Signal Processing Magazine, 25(1), pp. 107-115. (doi:10.1109/MSP.2008.4408447)

2007

Philiastides, M.G. and Sajda, P. (2007) EEG-informed fMRI reveals spatiotemporal characteristics of perceptual decision making. Journal of Neuroscience, 27(48), pp. 13082-13091. (doi:10.1523/​JNEUROSCI.3540-07.2007)

Sajda, P., Gerson, A. D., Philiastides, M. G. and Parra, L. (2007) Single-trial analysis of EEG during rapid visual discrimination: enabling cortically-coupled computer vision. In: Dornhege, G., Millán, J. d. R., Hinterberger, T., McFarland, D. J. and Müller, K.-R. (eds.) Towards Brain-Computer Interfacing. Series: Neural information processing series. The MIT Press: Cambridge, MA, pp. 423-440. ISBN 9780262042444

2006

Philiastides, M.G. and Sajda, P. (2006) Causal influences in the human brain during face discrimination: a short-window directed transfer function approach. IEEE Transactions on Biomedical Engineering, 53(12), pp. 2602-2605. (doi:10.1109/TBME.2006.885122)

Philiastides, M.G., Ratcliff, R. and Sajda, P. (2006) Neural representation of task difficulty and decision making during perceptual categorization: a timing diagram. Journal of Neuroscience, 26(35), pp. 8965-8975. (doi:10.1523/​JNEUROSCI.1655-06.2006)

Philiastides, M.G. and Sajda, P. (2006) Temporal characterization of the neural correlates of perceptual decision making in the human brain. Cerebral Cortex, 16(4), pp. 509-518. (doi:10.1093/cercor/bhi130)

2005

Muller, J., Philiastides, M.G. and Newsome, W. (2005) Microstimulation of the superior colliculus focuses attention without moving the eyes. Proceedings of the National Academy of Sciences of the United States of America, 102(3), pp. 524-529. (doi:10.1073/pnas.0408311101)

This list was generated on Sat Sep 23 10:28:04 2017 BST.
Number of items: 27.

Articles

Fouragnan, E., Queirazza, F., Retzler, C., Mullinger, K. J. and Philiastides, M. G. (2017) Spatiotemporal neural characterization of prediction error valence and surprise during reward learning in humans. Scientific Reports, 7, 4762. (doi:10.1038/s41598-017-04507-w) (PMID:28684734)

Pisauro, M. A., Fouragnan, E., Retzler, C. and Philiastides, M. G. (2017) Neural correlates of evidence accumulation during value-based decisions revealed via simultaneous EEG-fMRI. Nature Communications, 8, 15808. (doi:10.1038/ncomms15808) (PMID:28598432)

Kayser, S. J., Philiastides, M. G. and Kayser, C. (2017) Sounds facilitate visual motion discrimination via the enhancement of late occipital visual representations. NeuroImage, 148, pp. 31-41. (doi:10.1016/j.neuroimage.2017.01.010) (PMID:28082107) (PMCID:PMC5349847)

Diaz, J. A., Queirazza, F. and Philiastides, M. G. (2017) Perceptual learning alters post-sensory processing in human decision making. Nature Human Behaviour, 1, 0035. (doi:10.1038/s41562-016-0035)

Delis, I., Onken, A., Schyns, P. G., Panzen, S. and Philiastides, M. (2016) Space-by-time non-negative matrix factorization for single-trial decoding of M/EEG activity. NeuroImage, 133, pp. 504-515. (doi:10.1016/j.neuroimage.2016.03.043) (PMID:27033682) (PMCID:PMC4907687)

Fouragnan, E., Retzler, C., Mullinger, K. and Philiastides, M. G. (2015) Two spatiotemporally distinct value systems shape reward-based learning in the human brain. Nature Communications, 6, 8107. (doi:10.1038/ncomms9107) (PMID:26348160) (PMCID:PMC4569710)

Gherman, S. and Philiastides, M. G. (2015) Neural representations of confidence emerge from the process of decision formation during perceptual choices. NeuroImage, 106, pp. 134-143. (doi:10.1016/j.neuroimage.2014.11.036)

Philiastides, M., Heekeren, H. and Sajda, P. (2014) Human scalp potentials reflect a mixture of decision-related signals during perceptual choices. Journal of Neuroscience, 34(50), pp. 16877-16889. (doi:10.1523/JNEUROSCI.3012-14.2014) (PMID:25505339) (PMCID:PMC4261107/)

Lou, B., Li, Y., Philiastides, M. G. and Sajda, P. (2014) Prestimulus alpha power predicts fidelity of sensory encoding in perceptual decision making. NeuroImage, 87, pp. 242-251. (doi:10.1016/j.neuroimage.2013.10.041) (PMID:24185020) (PMCID:PMC3946902)

Blank, H., Guido, B., Heekeren, H.R. and Philiastides, M.G. (2013) Temporal characteristics of the influence of punishment on perceptual decision making in the human brain. Journal of Neuroscience, 33(9), pp. 3939-3952. (doi:10.1523/JNEUROSCI.4151-12.2013)

Filimon, F., Philiastides, M.G., Nelson, J.D., Kloosterman, N.A. and Heekeren, H.R. (2013) How embodied is perceptual decision making? Evidence for separate processing of perceptual and motor decisions. Journal of Neuroscience, 33(5), pp. 2121-2136. (doi:10.1523/JNEUROSCI.2334-12.2013)

Philiastides, M.G. and Ratcliff, R. (2013) Influence of branding on preference-based decision making. Psychological Science, 24(7), pp. 1208-1215. (doi:10.1177/0956797612470701)

Philiastides, M., Auksztulewicz, R., Heekeren, H. and Blankenburg, F. (2011) Causal role of dorsolateral prefrontal cortex in human perceptual decision making. Current Biology, 21(11), pp. 980-983. (doi:10.1016/j.cub.2011.04.034)

Philiastides, M. G., Biele, G., Vavatzanidis, N., Kazzer, P. and Heekeren, H. R. (2010) Temporal dynamics of prediction error processing during reward-based decision making. NeuroImage, 53(1), pp. 221-232. (doi:10.1016/j.neuroimage.2010.05.052) (PMID:20510376)

Philiastides, M., Biele, G. and Heekeren, H. (2010) A mechanistic account of value computation in the human brain. Proceedings of the National Academy of Sciences of the United States of America, 107(20), pp. 9430-9435. (doi:10.1073/pnas.1001732107)

Goldman, R. I., Wei, C.-Y., Philiastides, M. G., Gerson, A. D., Friedman, D., Brown, T. R. and Sajda, P. (2009) Single-trial discrimination for integrating simultaneous EEG and fMRI: Identifying cortical areas contributing to trial-to-trial variability in the auditory oddball task. NeuroImage, 47(1), pp. 136-147. (doi:10.1016/j.neuroimage.2009.03.062) (PMID:19345734) (PMCID:PMC2789455)

Ratcliff, R., Philiastides, M. and Sajda, P. (2009) Quality of evidence for perceptual decision making is indexed by trial-to-trial variability of the EEG. Proceedings of the National Academy of Sciences of the United States of America, 106(16), pp. 6539-6544. (doi:10.1073/pnas.0812589106)

Sajda, P., Philiastides, M.G. and Parra, L. (2009) Single-trial analysis of neuroimaging data: inferring neural networks underlying perceptual decision-making in the human brain. IEEE Reviews in Biomedical Engineering, 2, pp. 97-109.

Parra, L., Christoforou, C., Gerson, A., Dyrholm, M., Luo, A., Wagner, M., Philiastides, M.G. and Sajda, P. (2008) Spatiotemporal linear decoding of brain state: application to performance augmentation in high-throughput tasks. IEEE Signal Processing Magazine, 25(1), pp. 107-115. (doi:10.1109/MSP.2008.4408447)

Philiastides, M.G. and Sajda, P. (2007) EEG-informed fMRI reveals spatiotemporal characteristics of perceptual decision making. Journal of Neuroscience, 27(48), pp. 13082-13091. (doi:10.1523/​JNEUROSCI.3540-07.2007)

Philiastides, M.G. and Sajda, P. (2006) Causal influences in the human brain during face discrimination: a short-window directed transfer function approach. IEEE Transactions on Biomedical Engineering, 53(12), pp. 2602-2605. (doi:10.1109/TBME.2006.885122)

Philiastides, M.G., Ratcliff, R. and Sajda, P. (2006) Neural representation of task difficulty and decision making during perceptual categorization: a timing diagram. Journal of Neuroscience, 26(35), pp. 8965-8975. (doi:10.1523/​JNEUROSCI.1655-06.2006)

Philiastides, M.G. and Sajda, P. (2006) Temporal characterization of the neural correlates of perceptual decision making in the human brain. Cerebral Cortex, 16(4), pp. 509-518. (doi:10.1093/cercor/bhi130)

Muller, J., Philiastides, M.G. and Newsome, W. (2005) Microstimulation of the superior colliculus focuses attention without moving the eyes. Proceedings of the National Academy of Sciences of the United States of America, 102(3), pp. 524-529. (doi:10.1073/pnas.0408311101)

Book Sections

Sajda, P., Philiastides, M., Heekeren, H. and Ratcliff, R. (2011) Linking neuronal variability to perceptual decision making via neuroimaging. In: Glanzman, D. and Ding, M. (eds.) The Dynamic Brain: An Exploration of Neuronal Variability and its Functional Significance. Oxford University Press, pp. 214-232. ISBN 9780195393798 (doi:10.1093/acprof:oso/9780195393798.001.0001)

Philiastides, M. and Heekeren, H. (2009) Spatiotemporal characteristics of perceptual decision making in the human brain. In: Dreher, J.-C. and Tremblay, L. (eds.) Handbook of Reward and Decision Making. Academic Press: Burlington, pp. 185-212. ISBN 9780123746207 (doi:10.1016/B978-0-12-374620-7.00008-X)

Sajda, P., Gerson, A. D., Philiastides, M. G. and Parra, L. (2007) Single-trial analysis of EEG during rapid visual discrimination: enabling cortically-coupled computer vision. In: Dornhege, G., Millán, J. d. R., Hinterberger, T., McFarland, D. J. and Müller, K.-R. (eds.) Towards Brain-Computer Interfacing. Series: Neural information processing series. The MIT Press: Cambridge, MA, pp. 423-440. ISBN 9780262042444

This list was generated on Sat Sep 23 10:28:04 2017 BST.

Grants

Grants and Awards listed are those received whilst working with the University of Glasgow.

  • Neural correlates of learning and confidence during decision making and their utility in developing "intelligent technologies".
    Economic & Social Research Council
    2015 - 2018
     
  • MRC PsySTAR Grant
    Medical Research Council
    2014 - 2017
     
  • Spatiotemporal characterization of value judgments and reward processing in the human brain
    Biotechnology and Biological Sciences Research Council
    2013 - 2015
     
  • Neural correlates of decision confidence in the human brain
    British Academy
    2013 - 2015
     

Supervision

Supervised Postgraduate Students

Research Assistant

Visiting Collaborator