Professor Marios Philiastides

Professor of Decision Neuroscience (Centre for Cognitive Neuroimaging)

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

R651 Level 6, 62 Hillhead Street, Glasgow G12 8QB

Thursdays 12-2pm on Zoom; Email for Zoom link and password

ORCID iD https://orcid.org/0000-0002-7683-3506

Research interests

Our group is interested in characterising the neural principles guiding perceptual and value-based decisions in humans, including reinforcement-guided learning and reward-related activity in cortical and subcortical systems. 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 [in 3T and 7T systems], combined EEG-pupillometry) as well as interventional techniques (TMS/tDCS) along with computational modelling and multivariate single-trial data analysis techniques to expose the relevant brain networks and their underlying computations. We perform these measurements in control and clinical groups to understand healthy and maladaptive decision making and develop neural markers for predicting treatment response in psychiatry.

Lab Website:
http://mphiliastides.org

Publications

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Number of items: 39.

2022

Pisauro, M. A., Fouragnan, E. F., Arabadzhiyska, D. H., Apps, M. A. J. and Philiastides, M. G. (2022) Neural implementation of computational mechanisms underlying the continuous trade-off between cooperation and competition. Nature Communications, 13, 6873. (doi: 10.1038/s41467-022-34509-w) (PMID:36369180)

Arabadzhiyska, D. H., Garrod, O. G.B., Fouragnan, E., De Luca, E., Schyns, P. G. and Philiastides, M. (2022) A common neural account for social and non-social decisions. Journal of Neuroscience, (doi: 10.1523/JNEUROSCI.0375-22.2022) (PMID:36280264) (Early Online Publication)

2021

Philiastides, M. , Tu, T. and Sajda, P. (2021) Inferring macroscale network dynamics via EEG-fMRI fusion. Annual Review of Neuroscience, 44, pp. 315-334. (doi: 10.1146/annurev-neuro-100220-093239) (PMID:33761268)

Verdonck, S., Loossens, T. and Philiastides, M. G. (2021) The Leaky Integrating Threshold and its impact on evidence accumulation models of choice RT. Psychological Review, 128(2), pp. 203-221. (doi: 10.1037/rev0000258) (PMID:32915011)

McElhinney, P. , Paterson, G., Philiastides, M. and Gunamony, S. (2021) Numerical Modelling of a Close-fitting 8-channel Transceiver Head Coil and EEG Electrodes for Safety Validation at 7T. ISMRM 2021 Annual Meeting, 15-20 May 2021. (Accepted for Publication)

2020

Franzen, L., Delis, I., De Sousa, G., Kayser, C. and Philiastides, M. G. (2020) Auditory information enhances post-sensory visual evidence during rapid multisensory decision-making. Nature Communications, 11, 5440. (doi: 10.1038/s41467-020-19306-7) (PMID:33116148) (PMCID:PMC7595090)

Rahnev, D. et al. (2020) The Confidence Database. Nature Human Behaviour, 4(3), pp. 317-325. (doi: 10.1038/s41562-019-0813-1) (PMID:32015487) (PMCID:PMC7565481)

2019

Queirazza, F., Fouragnan, E., Steele, J. D., Cavanagh, J. and Philiastides, M. G. (2019) Neural correlates of weighted reward prediction error during reinforcement learning classify response to cognitive behavioral therapy in depression. Science Advances, 5(7), eaav4962. (doi: 10.1126/sciadv.aav4962) (PMID:31392266) (PMCID:PMC6669013)

2018

Gherman, S. and Philiastides, M. G. (2018) Human VMPFC encodes early signatures of confidence in perceptual decisions. eLife, 7, e38293. (doi: 10.7554/eLife.38293.001) (PMID:30247123) (PMCID:PMC6199131)

Fouragnan, E., Retzler, C. and Philiastides, M. G. (2018) Separate neural representations of prediction error valence and surprise: evidence from an fMRI meta‐analysis. Human Brain Mapping, 39(7), pp. 2887-2906. (doi: 10.1002/hbm.24047) (PMID:29575249) (PMCID:PMC6866507)

Weiss, A. R., Gillies, M. J., Philiastides, M. G. , Apps, M. A., Whittington, M. A., FitzGerald, J. J., Boccard, S. G., Aziz, T. Z. and Green, A. L. (2018) Dorsal anterior cingulate cortices differentially lateralize prediction errors and outcome valence in a decision-making task. Frontiers in Human Neuroscience, 12, 203. (doi: 10.3389/fnhum.2018.00203) (PMID:29872384) (PMCID:PMC5972193)

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) (PMCID:PMC5500565)

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) (PMCID:PMC5472767)

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)

Philiastides, M.G. , Diaz, J.A. and Gherman, S. (2017) Spatiotemporal characteristics and modulators of perceptual decision-making in the human brain. In: Dreher, J.-C. and Tremblay, L. (eds.) Decision Neuroscience: An Integrative Approach. Academic Press: London, pp. 137-147. ISBN 9780128053089 (doi: 10.1016/B978-0-12-805308-9.00011-7)

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)

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