Publications

Journal Papers

J.M. WalzM. Pedersen, A.H. Omidvarnia, M. Semmelroch, and G.D. Jackson (2016) "Spatio-temporal Mapping of Epileptic Spikes Using Simultaneous EEG-fMRI,” Brain (In press).

M. Pedersen, A.H. Omidvarnia, J.M. Walz, A. Zalesky, and G.D. Jackson (2016) "Spontaneous Brain Network Activity: Analysis of its Temporal Complexity," Network Neuroscience (Accepted)

A.H. Omidvarnia, M. Pedersen, J.M. Walz, D.N. Vaughan, D.F. Abbott, and G.D. Jackson (2016) “Dynamic Regional Phase Synchrony: An Instantaneous Measure of Local fMRI Connectivity Within Spatially Clustered Brain Areas,” Human Brain Mapping (Accepted)

M. Pedersen, A.H. Omidvarnia, J.M. Walz, and G.D. Jackson (2015) "Increased segregation of brain networks in focal epilepsy: An fMRI graph theory finding,” NeuroImage: Clinical  8:536-542.   PubMed  ResearchGate (download) 

J.M. Walz, R.I. Goldman, M. Carapezza, J. Muraskin, T.R. Brown, and P. Sajda (2015) “Prestimulus EEG Alpha Oscillations Modulate Task-Related fMRI BOLD Responses to Auditory Stimuli,” NeuroImage 113:153-163.  PubMed  ResearchGate (download)

L. Hong, J.M. Walz*, and P. Sajda (2014) “Your Eyes Give You Away: Changes in Pupil Diameter Correlate with Task-related EEG Dynamics,” PLoS ONE 9(3):e91321. *co-first-author  PubMed  ResearchGate (download)

J.M. Walz, R.I. Goldman, M. Carapezza, J. Muraskin, T.R. Brown, and P. Sajda (2014) "Simultaneous EEG-fMRI Reveals a Temporal Cascade of Task-Related and Default-Mode Activations During a Simple Target Detection Task," NeuroImage 102:229-239.  PubMed  ResearchGate (download)

B. Conroy, J.M. Walz, B. Cheung, and P. Sajda (2014) “Fast Simultaneous Training of Generalized Linear Models (FaSTGLZ)” arXiv 1307.8430.  ResearchGate (download) code

J.M. Walz, R.I. Goldman, J. Muraskin, M. Carapezza, T.R. Brown, and P. Sajda (2013) “Simultaneous EEG-fMRI Reveals Temporal Evolution of Coupling Between Supramodal Cortical Attention Networks and the Brainstem,” Journal of Neuroscience 33(49):19212-22.  PubMed  ResearchGate  CU Academic Commons (download)
B. Conroy, J.M. Walz, and P. Sajda (2013) “Fast Bootstrapping and Permutation Testing for Assessing Reproducibility and Interpretability of Multivariate fMRI Decoding Models,” PLoS ONE 8(11):e79271.  PubMed  ResearchGate (download)
Conference Papers

F. Pereira, J.M. Walz, E. Cetingul, S. Sudarsky, M. Nadar, and R. Prakash (2013) “Creating Group-Level Functionally-Defined Atlases for Diagnostic Classification,” 3rd International Workshop on Pattern Recognition in NeuroImaging (PRNI), June 22-24, Philadelphia, PA, USA.  ResearchGate
B. Conroy, J.M. Walz, and P. Sajda (2012) “Fast Simultaneous Training of Generalized Linear Models (FaSTGLZ) for Multi-voxel Pattern Analysis in fMRI,” 2nd NIPS workshop on Machine Learning and Interpretation in Neuroimaging (MLINI), December 7-8, Lake Tahoe, NV, USA.  ResearchGate (download)  code
B. Lou, J.M. Walz, J.V. Shi, and P. Sajda (2011) “Learning EEG Components for Discriminating Multi-Class Perceptual Decisions,” 5th Annual International IEEE EMBS Conference on Neural Engineering, April 27-May 1, Cancun, Mexico. pp. 675-678 in Conference Proceedings.  ResearchGate
Abstracts

J.M. Walz, M. Pedersen, A.H. Omidvarnia, D.N. Vaughan, D.F. Abbott, and G.D. Jackson (2015) “Peri-ictal Changes in Graph Theory Measures of Functional MRI Connectivity in Focal Epilepsy,” 7th International Workshop on Seizure Prediction, August 3-6, Melbourne, Australia.

J.M. Walz, M. Pedersen, A.H. Omidvarnia, D.N. Vaughan, D.F. Abbott, and G.D. Jackson (2015) “Peri-ictal Local Connectivity Changes in Focal Epilepsy using Dynamic Regional Homogeneity Analysis,” 21st Annual Meeting of the Organization for Human Brain Mapping, June 14-18, Honolulu, HI. 

J. Muraskin, T.R. Brown, B. Conroy, J. Shi, J.M. Walz, R.I. Goldman, and P. Sajda (2014) “Task Specific EEG Variability Enables Temporal Tagging of Simultaneously Acquired BOLD fMRI: Decomposing Networks Underlying Perceptual Decision Making,” ISMRM Workshop on Functional MRI: Emerging Techniques and New Interpretations, June 22-25, Charleston, SC.

B. Conroy, J.M. Walz, B. Cheung, and P. Sajda (2013) “Fast Simultaneous Training of Generalized Linear Models (FaSTGLZ) for fMRI Pattern Analysis,” Institute for Data Sciences and Engineering Inaugural Symposium, April 5, New York, NY. 
J.M. Walz, R.I. Goldman, J. Muraskin, B. Conroy, T.R. Brown, and P. Sajda (2013) “Brainstem Modulation of the P300: Evidence from Simultaneous EEG-fMRI,” 19th Annual Meeting of the Organization for Human Brain Mapping, June 16-20, Seattle, WA. 
B. Conroy, J.M. Walz, and P. Sajda (2013) “Fast Validation Testing of Sparse Classification and Regression Models for Multi-Voxel fMRI Analysis,” 19th Annual Meeting of the Organization for Human Brain Mapping, June 16-20, Seattle, WA. 
J.M. Walz, M. Carapezza, B. Lou, R.I. Goldman, T.R. Brown, and P. Sajda (2013) “Variability in Distribution of fMRI BOLD Response Linked to Prestimulus Alpha Power in Simultaneously-acquired EEG,"  ISMRM 21st Annual Meeting, April 20-26, Salt Lake City, UT.  Oral presentation.
J.M. Walz, M. Carapezza, J. Muraskin, R.I. Goldman, T.R. Brown, and P. Sajda (2012) “BOLD fMRI Correlates of Spontaneous Eye Blinks Detected Using Simultaneously-acquired EEG,” Society for Neuroscience Annual Meeting, October 13-17, New Orleans, LA.
L. Hong, J.M. Walz, and P. Sajda (2012) "Temporally Specific EEG Components Correlate with Perceived Anticipation and Task Engagement," Society for Neuroscience Annual Meeting, October 13-17, New Orleans, LA. 
J.M. Walz, J. Muraskin, R.I. Goldman, T.R. Brown, and P. Sajda (2012) “The Superposition of Task-dependent and Default Mode Networks During a Mundane Target Detection Task,” 18th Annual Meeting of the Organization for Human Brain Mapping, June 10-14, Beijing, China.
J.M. Walz, L. Hong, and P. Sajda (2012) “Correlates of Pupil Diameter and Single-Trial EEG Variability in an Auditory Oddball Task,” 18th Annual Meeting of the Organization for Human Brain Mapping, June 10-14, Beijing, China. 

B. Lou, Y. Li, J.M. Walz, and P. Sajda (2012) “Post-stimulus Trial-by-trial EEG Variability Indexes Mean and Variance of Pre-stimulus α Power,” 18th Annual Meeting of the Organization for Human Brain Mapping, June 10-14, Beijing, China. 
J.M. Walz, J. Muraskin, R.I. Goldman, T.R. Brown, and P. Sajda (2012) “Single-trial EEG Discriminant Components Acquired During 3T fMRI,” ISMRM 20th Annual Meeting, May 5-11, Melbourne, Australia. 
B. Lou, J.M. Walz, J.V. Shi and P. Sajda (2011) “Single-trial EEG Discriminators Predict Pre-stimulus Alpha Power During Perceptual Decision-making,” Computational and Systems Neuroscience (COSYNE) Meeting, Feb. 24-27, Salt Lake City, UT.
J. Sherwin, J.M. Walz, and P. Sajda (2010) “Using Hierarchical Temporal Memories to Track the Constituent Brain States Underlying Perceptual Decision Making,” DARPA NEST Meeting, Nov. 18-22, San Diego, CA.
J.M. Walz and P. Sajda (2010) “Time Domain vs. Frequency Domain Single-Trial EEG Analysis of a Perceptual Decision-Making Task,” 16th Annual Meeting of the Organization for Human Brain Mapping, June 6-10, Barcelona, Spain.
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