The HaxbyLab@Dartmouth

Samuel A. Nastase

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Samuel A. Nastase

PhD student

2012-2017:
PhD in Cognitive Neuroscience, Dartmouth College, USA (Advisor: James V. Haxby)
2010-2012:
MSc in Cognitive Neuroscience, University of Trento, Italy (Advisor: Uri Hasson)
2006-2010:
BA in Cognitive Science and Philosophy, Johns Hopkins University, USA (Advisor: Michael McCloskey)

Contact

Address:6207 Moore Hall, Hanover, NH 03755
Email:sam.nastase@gmail.com

Research interests

My current research focuses on using naturalistic stimuli to investigate the distributed neural representation of high-level semantic information (e.g., object and action categories). In particular, I’m interested in using hyperalignment to construct representational atlases of human cortex, and in characterizing how behavioral goals reshape representational geometry.

Publications

Articles

[CSG+16]Connolly, A. C. , et al. (2016). How the human brain represents perceived dangerousness or “predacity” of animals. Journal of Neuroscience, 36, 5373–-5384. [PDF] [URL] DOI: 10.1523/jneurosci.3395-15.2016
[NCO+biorxiv16]Nastase, S. A. , et al. (2016). Attention selectively reshapes the geometry of distributed semantic representation. bioRxiv. [PDF] [URL] DOI: 10.1101/045252
[NID+15]Nastase, S. A. , Iacovella, V., Davis, B. and Hasson, U. (2015). Connectivity in the human brain dissociates entropy and complexity of auditory input. NeuroImage, 108, 292-300. [PDF] DOI: 10.1016/j.neuroimage.2014.12.048
[NIH+14]Nastase, S. A. , Iacovella, V. and Hasson, U. (2014). Uncertainty in visual and auditory series is coded by modality-general and modality-specific neural systems. Human Brain Mapping, 35, 1111-28. [PDF] DOI: 10.1002/hbm.22238

Conference Proceedings

[NHD+16]Nastase, S. A. , Halchenko, Y. O. , Davis, B. and Hasson, U. (2016). Cross-modal searchlight classification: Methodological challenges and recommended solutions. In (Eds.) 2016 International Workshop on Pattern Recognition in Neuroimaging (PRNI). [PDF] DOI: 10.1109/PRNI.2016.7552355

Miscellaneous

Posters

[NGH+SFN16]Nastase, S. A. , Guntupalli, J. S. , Haxby, J. V. and Halchenko, Y. O. (2016). Localizing functional regions of interest based on responses to dynamic naturalistic stimuli. Poster presented at the annual meeting of the Society for Neuroscience, Chicago, IL. [PDF]
[NVH+SFN15]Nastase, S. A. , Visconti di Oleggio Castello, M., Halchenko, Y. O. , Connolly, A. C. and Oosterhof, N. N. (2015). Attention alters animal and action representation in highly-distributed functionally-defined cortical parcels. Poster presented at the annual meeting of the Society for Neuroscience, Chicago, IL. [PDF]
[VNH+SFN15]Visconti di Oleggio Castello, M., Nastase, S. A. , Gobbini, M. I. , Haxby, J. V. and Halchenko, Y. O. (2015). Finding cortical patches of shared representations: a comparison of clustering algorithms on representational geometries, and the effect of cross­-validation to reduce physiological noise. Poster presented at the annual meeting of the Society for Neuroscience, Chicago, IL. [PDF]
[VNH+OHBM15]Visconti di Oleggio Castello, M., Nastase, S. A. , Haxby, J. V. , Gobbini, M. I. and Halchenko, Y. O. (2015). Clustering cortical searchlights based on shared representational geometry. Poster presented at the annual Meeting of the Organization for Human Brain Mapping, Honolulu, HI. [PDF]
[NCO+OHBM14]Nastase, S. A. , Connolly, A. C. , Oosterhof, N. N. , Halchenko, Y. O. , Gors, J. , Gobbini, M. I. and Haxby, J. V. (2014). Attention locally modulates the discriminability of high-level, task-relevant representations. Poster presented at the annual meeting of the Organization for Human Brain Mapping, Hamburg, Germany. [PDF]
[NCO+VSS14]Nastase, S. A. , Connolly, A. C. , Oosterhof, N. N. , Halchenko, Y. O. , Gors, J. , Gobbini, M. I. and Haxby, J. V. (2014). Attentional allocation locally warps representational space. Poster presented at the annual meeting of the Vision Sciences Society, St. Pete Beach, FL. [PDF]

Talks

[NOH+OHBM15]Nastase, S. A. , Visconti di Oleggio Castello, M., Haxby, J. V. , Gobbini, M. I. and Halchenko, Y. O. (2015). Clustering cortical searchlights based on shared representational geometry. Oral presentation at the annual meeting of the Organization for Human Brain Mapping, Honolulu, HI.

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