James J Pekar

Fac-Assoc Prof-Staff

1985 …2018
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Research Output 1985 2018

2018

Early functional connectome integrity and 1-year recovery in comatose survivors of cardiac arrest

Sair, H. I., Hannawi, Y., Li, S., Kornbluth, J., Demertzi, A., Di Perri, C., Chabanne, R., Jean, B., Benali, H., Perlbarg, V., Pekar, J., Luyt, C. E., Galanaud, D., Velly, L., Puybasset, L., Laureys, S., Caffo, B. & Stevens, R. D., Apr 1 2018, In : Radiology. 287, 1, p. 247-255 9 p.

Research output: Contribution to journalArticle

Connectome
Coma
Heart Arrest
Survivors
Magnetic Resonance Imaging

Improved estimation of subject-level functional connectivity using full and partial correlation with empirical Bayes shrinkage

Mejia, A. F., Nebel, M. B., Barber, A. D., Choe, A. S., Pekar, J. J., Caffo, B. S. & Lindquist, M. A., May 15 2018, In : NeuroImage. 172, p. 478-491 14 p.

Research output: Contribution to journalArticle

Bayes Theorem
Connectome
Research Design
Magnetic Resonance Imaging
2017

Abnormal grey matter arteriolar cerebral blood volume in schizophrenia measured with 3D inflow-based vascular-space-occupancy MRI at 7T

Hua, J., Brandt, A. S., Lee, S. W., Blair, N. I. S., Wu, Y., Lui, S., Patel, J., Faria, A. V., Lim, I. A. L., Unschuld, P. G., Pekar, J. J., Van Zijl, P. C. M., Ross, C. A. & Margolis, R. L., 2017, In : Schizophrenia Bulletin. 43, 3, p. 620-632 13 p.

Research output: Contribution to journalArticle

Blood Vessels
Schizophrenia
Brain
Microvessels
Cerebrovascular Circulation
Cerebrovascular Circulation
Hematocrit
Hemodynamics
Oxygen
Magnetic Resonance Imaging
Photic Stimulation
Cerebrovascular Circulation
Magnetic Resonance Imaging
Cerebral Blood Volume
Oxygen

Comparing test-retest reliability of dynamic functional connectivity methods

Choe, A. S., Nebel, M. B., Barber, A. D., Cohen, J. R., Xu, Y., Pekar, J. J., Caffo, B. & Lindquist, M. A., Sep 1 2017, In : NeuroImage. 158, p. 155-175 21 p.

Research output: Contribution to journalArticle

Reproducibility of Results
Brain
Magnetic Resonance Imaging
Connectome
Signal-To-Noise Ratio

Parallel group independent component analysis for massive fMRI data sets

Chen, S., Huang, L., Qiu, H., Nebel, M. B., Mostofsky, S. H., Pekar, J. J., Lindquist, M. A., Eloyan, A. & Caffo, B. S., Mar 1 2017, In : PLoS One. 12, 3, e0173496

Research output: Contribution to journalArticle

Independent component analysis
Magnetic Resonance Imaging
computer techniques
Functional Neuroimaging
Functional neuroimaging

Subject-specific regional measures of water diffusion are associated with impairment in chronic spinal cord injury

Choe, A. S., Sadowsky, C. L., Smith, S. A., van Zijl, P. C. M., Pekar, J. J. & Belegu, V., Aug 1 2017, In : Neuroradiology. 59, 8, p. 747-758 12 p.

Research output: Contribution to journalArticle

Diffusion Tensor Imaging
Spinal Cord Injuries
Water
Wounds and Injuries
Biomarkers
2016

Atypical lateralization of motor circuit functional connectivity in children with autism is associated with motor deficits

Floris, D. L., Barber, A. D., Nebel, M. B., Martinelli, M., Lai, M. C., Crocetti, D., Baron-Cohen, S., Suckling, J., Pekar, J. J. & Mostofsky, S. H., Jul 14 2016, In : Molecular Autism. 7, 1, 35

Research output: Contribution to journalArticle

Autistic Disorder
Language
Neurologic Examination
Physical Examination
Fingers

Decoupling of reaction time-related default mode network activity with cognitive demand

Barber, A. D., Caffo, B. S., Pekar, J. J. & Mostofsky, S. H., Mar 22 2016, (Accepted/In press) In : Brain Imaging and Behavior. p. 1-11 11 p.

Research output: Contribution to journalArticle

Reaction Time
Oxygen
Short-Term Memory

Demonstration of Brain Tumor-Induced Neurovascular Uncoupling in Resting-State fMRI at Ultrahigh Field

Agarwal, S., Sair, H. I., Airan, R., Hua, J., Jones, C. K., Heo, H. Y., Olivi, A., Lindquist, M. A., Pekar, J. J. & Pillai, J. J., May 1 2016, In : Brain Connectivity. 6, 4, p. 267-272 6 p.

Research output: Contribution to journalArticle

Brain Neoplasms
Magnetic Resonance Imaging
Oxygen
Linear Models
Neoplasms

Factors affecting characterization and localization of interindividual differences in functional connectivity using MRI

Airan, R. D., Vogelstein, J. T., Pillai, J. J., Caffo, B., Pekar, J. J. & Sair, H. I., 2016, (Accepted/In press) In : Human Brain Mapping.

Research output: Contribution to journalArticle

Magnetic Resonance Imaging
Functional Neuroimaging
Executive Function
Brain
Datasets

Intrinsic visual-motor synchrony correlates with social deficits in autism

Nebel, M. B., Eloyan, A., Nettles, C. A., Sweeney, K. L., Ament, K., Ward, R. E., Choe, A. S., Barber, A. D., Pekar, J. J. & Mostofsky, S. H., Apr 15 2016, In : Biological Psychiatry. 79, 8, p. 633-641 9 p.

Research output: Contribution to journalArticle

Autistic Disorder
Motor Skills
Brain
Autism Spectrum Disorder
Sensory Feedback

Reaction time-related activity reflecting periodic, task-specific cognitive control

Barber, A. D., Pekar, J. J. & Mostofsky, S. H., Jan 1 2016, In : Behavioural Brain Research. 296, p. 100-108 9 p.

Research output: Contribution to journalArticle

Reaction Time
Oxygen
Parietal Lobe
Short-Term Memory
Maintenance
2015

Connectivity supporting attention in children with attention deficit hyperactivity disorder

Barber, A. D., Jacobson, L. A., Wexler, J. L., Nebel, M. B., Caffo, B. S., Pekar, J. J. & Mostofsky, S. H., 2015, In : NeuroImage: Clinical. 7, p. 68-81 14 p.

Research output: Contribution to journalArticle

Attention Deficit Disorder with Hyperactivity
Brain
Occipital Lobe
Frontal Lobe
Short-Term Memory

Does acute caffeine ingestion alter brain metabolism in young adults?

Xu, F., Liu, P., Pekar, J. J. & Lu, H., Apr 5 2015, In : NeuroImage. 110, p. 39-47 9 p.

Research output: Contribution to journalArticle

Caffeine
Young Adult
Eating
Brain
Oxygen

Improving reliability of subject-level resting-state fMRI parcellation with shrinkage estimators

Mejia, A. F., Nebel, M. B., Shou, H., Crainiceanu, C. M., Pekar, J. J., Mostofsky, S., Caffo, B. & Lindquist, M. A., May 5 2015, In : NeuroImage. 112, p. 14-29 16 p.

Research output: Contribution to journalArticle

Cluster Analysis
Magnetic Resonance Imaging
Brain
Motor Cortex
Signal-To-Noise Ratio

Motor overflow in children with attention-deficit/hyperactivity disorder is associated with decreased extent of neural activation in the motor cortex

Gaddis, A., Rosch, K. S., Dirlikov, B., Crocetti, D., MacNeil, L., Barber, A. D., Muschelli, J., Caffo, B., Pekar, J. J. & Mostofsky, S. H., 2015, In : Psychiatry Research - Neuroimaging. 233, 3, p. 488-495 8 p.

Research output: Contribution to journalArticle

Motor Cortex
Attention Deficit Disorder with Hyperactivity
Fingers
Hand
Magnetic Resonance Imaging
Oxygenation
gamma-Aminobutyric Acid
cortex
Blood
Chemical activation

Neural Correlates of Visuomotor Learning in Autism

Sharer, E., Crocetti, D., Muschelli, J., Barber, A. D., Nebel, M. B., Caffo, B. S., Pekar, J. J. & Mostofsky, S. H., Dec 1 2015, In : Journal of Child Neurology. 30, 14, p. 1877-1886 10 p.

Research output: Contribution to journalArticle

Autistic Disorder
Learning
Reaction Time
Motor Skills
Gyrus Cinguli
reproducibility
Magnetic Resonance Imaging
Outcome Assessment (Health Care)
biomarkers
Biomarkers

Steady pulsed imaging and labeling scheme for noninvasive perfusion imaging

Xu, J., Qin, Q., Wu, D., Hua, J., Song, X., Mcmahon, M. T., Northington, F. J., Zhang, J., van Zijl, P. C. M. & Pekar, J. J., 2015, (Accepted/In press) In : Magnetic Resonance in Medicine.

Research output: Contribution to journalArticle

Perfusion Imaging
Perfusion
Ischemia
Equipment and Supplies
Brain
2014

Analytic programming with fMRI data: A quick-start guide for statisticians using R

Eloyan, A., Li, S., Muschelli, J., Pekar, J. J., Mostofsky, S. H. & Caffo, B. S., Feb 28 2014, In : PLoS One. 9, 2, e89470

Research output: Contribution to journalArticle

magnetic resonance imaging
Magnetic Resonance Imaging
neurophysiology
Medical imaging
Diagnostic Imaging

Disruption of functional organization within the primary motor cortex in children with autism

Nebel, M. B., Joel, S. E., Muschelli, J., Barber, A. D., Caffo, B. S., Pekar, J. J. & Mostofsky, S. H., Feb 2014, In : Human Brain Mapping. 35, 2, p. 567-580 14 p.

Research output: Contribution to journalArticle

Motor Cortex
Autistic Disorder
Brain
Lower Extremity
Upper Extremity

Prefrontal brain network connectivity indicates degree of both schizophrenia risk and cognitive dysfunction

Unschuld, P. G., Buchholz, A. S., Varvaris, M., Van Zijl, P. C. M., Ross, C. A., Pekar, J. J., Hock, C., Sweeney, J. A., Tamminga, C. A., Keshavan, M. S., Pearlson, G. D., Thaker, G. K. & Schretlen, D. J., 2014, In : Schizophrenia Bulletin. 40, 3, p. 653-664 12 p.

Research output: Contribution to journalArticle

Prefrontal Cortex
Schizophrenia
Brain
Short-Term Memory
Cognitive Dysfunction

Reduction of motion-related artifacts in resting state fMRI using aCompCor

Muschelli, J., Nebel, M. B., Caffo, B. S., Barber, A. D., Pekar, J. J. & Mostofsky, S. H., Aug 1 2014, In : NeuroImage. 96, p. 22-35 14 p.

Research output: Contribution to journalArticle

Artifacts
Magnetic Resonance Imaging
Principal Component Analysis
Head

Shrinkage prediction of seed-voxel brain connectivity using resting state fMRI

Shou, H., Eloyan, A., Nebel, M. B., Mejia, A., Pekar, J. J., Mostofsky, S., Caffo, B., Lindquist, M. A. & Crainiceanu, C. M., Nov 5 2014, In : NeuroImage. 102, P2, p. 938-944 7 p.

Research output: Contribution to journalArticle

Seeds
Magnetic Resonance Imaging
Brain
Research Personnel
Population

Three-dimensional acquisition of cerebral blood volume and flow responses during functional stimulation in a single scan

Cheng, Y., van Zijl, P. C. M., Pekar, J. J. & Hua, J., Dec 1 2014, In : NeuroImage. 103, p. 533-541 9 p.

Research output: Contribution to journalArticle

Cerebrovascular Circulation
Magnetic Resonance Imaging
Signal-To-Noise Ratio
Blood Vessels
Noise
Magnetic Resonance Imaging
Brain
Motor Activity
Air
Power (Psychology)
2013

Developmental changes in within- and between-network connectivity between late childhood and adulthood

Barber, A. D., Caffo, B. S., Pekar, J. J. & Mostofsky, S. H., Jan 2013, In : Neuropsychologia. 51, 1, p. 156-167 12 p.

Research output: Contribution to journalArticle

Cognition
Prefrontal Cortex
Parietal Lobe
Aptitude
Parahippocampal Gyrus
Short-Term Memory
demand
Prefrontal Cortex
activation
Motor Cortex
Spinal Cord Injuries
Diffusion Tensor Imaging
Magnetic Resonance Imaging
Wounds and Injuries
Multimodal Imaging

Not All Reading Disabilities Are Dyslexia: Distinct Neurobiology of Specific Comprehension Deficits

Cutting, L. E., Clements-Stephens, A., Pugh, K. R., Burns, S., Cao, A., Pekar, J. J., Davis, N. & Rimrodt, S. L., Apr 1 2013, In : Brain Connectivity. 3, 2, p. 199-211 13 p.

Research output: Contribution to journalArticle

Dyslexia
Neurobiology
Reading
Prefrontal Cortex
Aptitude

Prefrontal executive function associated coupling relates to Huntington's disease stage

Unschuld, P. G., Liu, X., Shanahan, M., Margolis, R. L., Bassett, S. S., Brandt, J., Schretlen, D. J., Redgrave, G. W., Hua, J., Hock, C., Reading, S. A., van Zijl, P. C. M., Pekar, J. J. & Ross, C. A., Nov 2013, In : Cortex. 49, 10, p. 2661-2673 13 p.

Research output: Contribution to journalArticle

Huntington Disease
Executive Function
Cytosine
Guanine
Adenine
2012

Advanced MRI strategies for assessing spinal cord injury

Smith, S. A., Pekar, J. J. & Van Zijl, P. C. M., 2012, In : Handbook of Clinical Neurology. 109, p. 85-101 17 p.

Research output: Contribution to journalArticle

Spinal Cord Injuries
Magnetic Resonance Spectroscopy
Spinal Cord
Diffusion Tensor Imaging
Perfusion Imaging

Analysis of Group ICA-Based Connectivity Measures from fMRI: Application to Alzheimer's Disease

Li, S., Eloyan, A., Joel, S., Mostofsky, S., Pekar, J., Bassett, S. S. & Caffo, B., Nov 30 2012, In : PLoS One. 7, 11, e49340

Research output: Contribution to journalArticle

Independent component analysis
Alzheimer disease
magnetic resonance imaging
Alzheimer Disease
Magnetic Resonance Imaging
Atlases
Anatomy
Brain
Signal-To-Noise Ratio
Reproducibility of Results

Automated diagnoses of attention deficit hyperactive disorder using magnetic resonance imaging

Eloyan, A., Muschelli, J., Nebel, M. B., Liu, H., Han, F., Zhao, T., Barber, A. D., Joel, S., Pekar, J. J., Mostofsky, S. H. & Caffo, B., Aug 30 2012, In : Frontiers in Systems Neuroscience. AUG 2012, p. 1-9 9 p.

Research output: Contribution to journalArticle

Attention Deficit Disorder with Hyperactivity
Magnetic Resonance Imaging
Biomarkers
Intelligence
Research

Automated diagnoses of attention deficit hyperactive disorder using magnetic resonance imaging

Eloyan, A., Muschelli, J., Nebel, M. B., Liu, H., Han, F., Zhao, T., Barber, A., Joel, S., Pekar, J. J., Mostofsky, S. & Caffo, B., Jul 31 2012, In : Frontiers in Systems Neuroscience. JULY 2012

Research output: Contribution to journalArticle

Attention Deficit Disorder with Hyperactivity
Magnetic Resonance Imaging
Biomarkers
Intelligence
Research

CEST phase mapping using a length and offset varied saturation (LOVARS) scheme

Song, X., Gilad, A. A., Joel, S., Liu, G., Bar-Shir, A., Liang, Y., Gorelik, M., Pekar, J. J., Van Zijl, P. C. M., Bulte, J. W. M. & McMahon, M. T., Oct 2012, In : Magnetic Resonance in Medicine. 68, 4, p. 1074-1086 13 p.

Research output: Contribution to journalArticle

Noise
Gliosarcoma
Contrast Sensitivity
Molecular Imaging
Gadolinium
Huntington Disease
Prefrontal Cortex
Depression
Cytosine
Guanine

Impaired cortico-striatal functional connectivity in prodromal Huntington's Disease

Unschuld, P. G., Joel, S. E., Liu, X., Shanahan, M., Margolis, R. L., Biglan, K. M., Bassett, S. S., Schretlen, D. J., Redgrave, G. W., van Zijl, P. C. M., Pekar, J. J. & Ross, C. A., Apr 18 2012, In : Neuroscience Letters. 514, 2, p. 204-209 6 p.

Research output: Contribution to journalArticle

Corpus Striatum
Huntington Disease
Basal Ganglia
Caudate Nucleus
Oxygen

Motor "dexterity": Evidence that left hemisphere lateralization of motor circuit connectivity is associated with better motor performance in children

Barber, A. D., Srinivasan, P., Joel, S. E., Caffo, B. S., Pekar, J. J. & Mostofsky, S. H., Jan 2012, In : Cerebral Cortex. 22, 1, p. 51-59 9 p.

Research output: Contribution to journalArticle

Aptitude
Putamen
Periodicity
Child Development
Thalamus

Neural circuitry associated with two different approaches to novel word learning

Clements-Stephens, A. M., Materek, A. D., Eason, S. H., Scarborough, H. S., Pugh, K. R., Rimrodt, S., Pekar, J. J. & Cutting, L. E., Feb 15 2012, In : Developmental Cognitive Neuroscience. 2, SUPPL. 1

Research output: Contribution to journalArticle

Learning
Reading
Teaching
Neural Pathways
Semantics
2011
Temporal Lobe
Autistic Disorder
Prefrontal Cortex
Magnetic Resonance Imaging
Learning
Attention Deficit Disorder with Hyperactivity
Parietal Lobe
Gyrus Cinguli
Brain
Prefrontal Cortex

Inflow-based vascular-space-occupancy (iVASO) MRI

Hua, J., Qin, Q., Donahue, M. J., Zhou, J., Pekar, J. J. & Van Zijl, P. C. M., Jul 2011, In : Magnetic Resonance in Medicine. 66, 1, p. 40-56 17 p.

Research output: Contribution to journalArticle

Blood Vessels
Signal-To-Noise Ratio
Cerebrospinal Fluid
Photic Stimulation
Perfusion

Measurement of absolute arterial cerebral blood volume in human brain without using a contrast agent

Hua, J., Qin, Q., Pekar, J. J. & van Zijl, P. C. M., Dec 2011, In : NMR in Biomedicine. 24, 10, p. 1313-1325 13 p.

Research output: Contribution to journalArticle

Contrast Media
Brain
Blood
Crushers
Blood Vessels

Multi-parametric neuroimaging reproducibility: A 3-T resource study

Landman, B. A., Huang, A. J., Gifford, A., Vikram, D. S., Lim, I. A. L., Farrell, J. A. D., Bogovic, J. A., Hua, J., Chen, M., Jarso, S., Smith, S. A., Joel, S., Mori, S., Pekar, J. J., Barker, P. B., Prince, J. L. & van Zijl, P. C. M., Feb 14 2011, In : NeuroImage. 54, 4, p. 2854-2866 13 p.

Research output: Contribution to journalArticle

Neuroimaging
Putamen
Brain
Thalamus
Brain Stem

On the relationship between seed-based and ICA-based measures of functional connectivity

Joel, S. E., Caffo, B. S., Van Zijl, P. C. M. & Pekar, J. J., Sep 2011, In : Magnetic Resonance in Medicine. 66, 3, p. 644-657 14 p.

Research output: Contribution to journalArticle

Seeds
Magnetic Resonance Imaging
Task Performance and Analysis
Brain