Research Topics
| E HalgrenSummaryAffiliation: Harvard University Country: USA Publications
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Detail Information
Publications
Cognitive response profile of the human fusiform face area as determined by MEGE Halgren
INSERM E9926, Marseilles, France, Massachusetts General Hospital Nuclear Magnetic Resonance Center, Harvard Medical School, USA
Cereb Cortex 10:69-81. 2000..This source significantly distinguished happy and sad faces from those with neutral expressions. We conclude that the fusiform gyrus may selectively encode faces at 165 ms, transforming sensory input for further processing...- Rapid distributed fronto-parieto-occipital processing stages during working memory in humansE Halgren
Institut National de la Sante et de la Recherche Medicale, CJF90 12, Neurologie, CHU Pontchaillou, F 35033 Rennes, France
Cereb Cortex 12:710-28. 2002.... - N400-like magnetoencephalography responses modulated by semantic context, word frequency, and lexical class in sentencesEric Halgren
MGH NMR Center, Harvard Medical School, Boston, Massachusetts, USA
Neuroimage 17:1101-16. 2002..These results help identify a distributed cortical network that supports online semantic processing... - How can intracranial recordings assist MEG source localization?E Halgren
Massachusetts General Hospital, Massachusetts Institute of Technology, Harvard Medical School, Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Neurol Clin Neurophysiol 2004:86. 2004..MEG publications should explicitly acknowledge these limitations. If possible, reference should be made to more certain knowledge, which in some cases includes iEEG... - The value of multichannel MEG and EEG in the presurgical evaluation of 70 epilepsy patientsS Knake
Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA 02129, USA
Epilepsy Res 69:80-6. 2006.... - Arousal-related P3a to novel auditory stimuli is abolished by a moderately low alcohol doseK Marinkovic
MGH-NMR Center, Harvard Medical School, 149 13th Street, Rm. 2301, Charlestown, MA 02129, USA
Alcohol Alcohol 36:529-39. 2001..Overall, these results indicate that alcohol affects multiple brain systems concerned with arousal, attentional processes and cognitive-autonomic integration... - Dynamic statistical parametric mapping: combining fMRI and MEG for high-resolution imaging of cortical activityA M Dale
Massachusetts General Hospital Nuclear Magnetic Resonance Center, Charlestown 02129, USA
Neuron 26:55-67. 2000..Repetition effects were observed in many of the same areas following this initial wave of activation, providing evidence for the involvement of feedback mechanisms in repetition priming... - Spatiotemporal mapping of brain activity by integration of multiple imaging modalitiesA M Dale
Massachusetts General Hospital Nuclear Magnetic Resonance Center, 149 13th Street, Charlestown, MA 02129, USA
Curr Opin Neurobiol 11:202-8. 2001..Further advances in multi-modality integration will require an improved understanding of the coupling between the physiological phenomena underlying the different signal modalities... 
Top-down facilitation of visual recognitionM Bar
Martinos Center at Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
Proc Natl Acad Sci U S A 103:449-54. 2006..Taken together, the dynamics we revealed provide strong support for the proposal of how top-down facilitation of object recognition is initiated, and our observations are used to derive predictions for future research...- Cortical thickness in a case of congenital unilateral perisylvian syndromeA Kotini
NMR MGH Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
Neurol Clin Neurophysiol 2004:4. 2004..There was a significant difference of thickness between homologous hemispheric areas. To our surprise some areas of the left hemisphere also appeared to have increased thickness, raising the question of a bilateral asymmetric case... - Head position in the MEG helmet affects the sensitivity to anterior sourcesK Marinkovic
Athinoula A Martinos Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
Neurol Clin Neurophysiol 2004:30. 2004..These results emphasize the need to adjust the head position in the helmet in order to maximize the "visibility" of the sources in the anterior brain regions in cognitive and language tasks... - 3T phased array MRI improves the presurgical evaluation in focal epilepsies: a prospective studyS Knake
A.A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, USA
Neurology 65:1026-31. 2005..5T studies read at tertiary care centers... - The advantage of combining MEG and EEG: comparison to fMRI in focally stimulated visual cortexDahlia Sharon
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA 02129, USA
Neuroimage 36:1225-35. 2007..Thus, combining MEG and EEG data is important for high-resolution spatiotemporal studies of the human brain... - Ecphory of autobiographical memories: an fMRI study of recent and remote memory retrievalSarah Steinvorth
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Neuroimage 30:285-98. 2006..This network, including MTL structures, changed little with the age of the memories... - What vs. where in touch: an fMRI studyCatherine L Reed
Department of Psychology, University of Denver, 2155 S Race St, Denver, CO 80208, USA
Neuroimage 25:718-26. 2005..LOC activated bilateral superior parietal areas involved in spatial processing. The dissociation of object and spatial processing streams appears to be a modality general organizational principle in the brain... - Processing stages underlying word recognition in the anteroventral temporal lobeEric Halgren
Multimodal Imaging Laboratory, Department of Radiology, University of California at San Diego, La Jolla, CA 92093 0841, USA
Neuroimage 30:1401-13. 2006.... - Objective phonological and subjective perceptual characteristics of syllables modulate spatiotemporal patterns of superior temporal gyrus activityRichard E Frye
Division of Child and Adolescent Neurology, University of Texas Health Science Center at Houston, Houston, TX, USA
Neuroimage 40:1888-901. 2008..Moreover, our results demonstrate that both objective phonological and subjective perceptual characteristics of syllables independently modulate spatiotemporal patterns of cortical activation... 
Regional neocortical thinning in mesial temporal lobe epilepsyCarrie R McDonald
Department of Psychiatry, and Multimodal Imaging Laboratory, University of California, San Diego, CA 92093 0841, USA
Epilepsia 49:794-803. 2008..To determine the nature and extent of regional cortical thinning in patients with mesial temporal lobe epilepsy (MTLE)...- Properties of in vivo interictal spike generation in the human subiculumDániel Fabó
Institute for Psychology, Hungarian Academy of Sciences, 1068 Budapest, Szondi u 83 85, Hungary
Brain 131:485-99. 2008..Limited data suggest that subiculum might even play a pacemaker role in the generation of paroxysmal discharges... - Linear coding of voice onset timeRichard E Frye
University of Texas Health Science Center at Houston, TX 77030, USA
J Cogn Neurosci 19:1476-87. 2007.... - A novel integrated MEG and EEG analysis method for dipolar sourcesMing Xiong Huang
Department of Radiology, University of California, San Diego, San Diego, CA 92121, USA
Neuroimage 37:731-48. 2007..We then demonstrated that this new approach performed reliably in an analysis of the 20-ms component from human somatosensory responses elicited by electric median-nerve stimulation... - Vector-based spatial-temporal minimum L1-norm solution for MEGMing Xiong Huang
Department of Radiology, University of California, San Diego, CA 92037, USA
Neuroimage 31:1025-37. 2006..g., BA 5, 7, SII, SMA, and temporal-parietal junction) with high temporal stability and resolution. VESTAL's potential for obtaining information on source extent was also examined... - Developmental instability and the neural dynamics of the speed-intelligence relationshipRobert J Thoma
Center for Neuropsychological Services, Department of Psychiatry, 915 Vassar NE, 1 University of New Mexico, Albuquerque, NM 87131 0001, USA
Neuroimage 32:1456-64. 2006..These observations suggest that fluid intelligence is primarily related to speed during processing associated with decision time, while fluctuating asymmetry predicted slower processing across all stages of information processing... - Abstract grammatical processing of nouns and verbs in Broca's area: evidence from fMRINed T Sahin
Department of Psychology, Harvard University, Cambridge, MA 02138, USA
Cortex 42:540-62. 2006.... - Spatiotemporal cortical dynamics underlying abstract and concrete word readingRupali P Dhond
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Hum Brain Mapp 28:355-62. 2007.... - Aids to telemetry in the presurgical evaluation of epilepsy patients: MRI, MEG and other non-invasive imaging techniquesSusanne Knake
Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Suppl Clin Neurophysiol 57:494-502. 2004 - Spatiotemporal maps of past-tense verb inflectionRupali P Dhond
Department of Radiology, University of Utah, Salt Lake City 84105, USA
Neuroimage 19:91-100. 2003..Thus, the brain inflects verbs by dynamically modulating different functional divisions of an integrated language system... - Effects of alcohol on verbal processing: an event-related potential studyKsenija Marinkovic
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
Alcohol Clin Exp Res 28:415-23. 2004..Using event-related potentials (ERP) and a word-recognition paradigm, this study investigated the effects of alcohol intoxication on prelexical, semantic, and mnemonic aspects of verbal processing... - Spatiotemporal dynamics of modality-specific and supramodal word processingKsenija Marinkovic
Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Neuron 38:487-97. 2003..Comparison of response patterns during repetition priming between the two modalities suggest that they are initiated by modality-specific memory systems, but that they are eventually elaborated mainly in supramodal areas... - Laminar analysis of human neocortical interictal spike generation and propagation: current source density and multiunit analysis in vivoIstvan Ulbert
Department of Neurosurgery, Stanford University Medical Center, Stanford, California, USA
Epilepsia 45:48-56. 2004.... - Cortical activation to illusory shapes as measured with magnetoencephalographyEric Halgren
MGH MIT HMS Athinoula A Martinos Biomedical Imaging Center, Charlestown, MA 02129
Neuroimage 18:1001-9. 2003..The V1/V2 modulation at this time may reflect top-down modulation by lateral occipitotemporal and ventral temporal areas... - Responses of human anterior cingulate cortex microdomains to error detection, conflict monitoring, stimulus-response mapping, familiarity, and orientingChunmao Wang
Comprehensive Epilepsy Center, New York University School of Medicine, New York, New York 10016, USA
J Neurosci 25:604-13. 2005..These data suggest that each anterior cingulate microdomain participates in a multilobar cortical network after behavioral responses in a variety of tasks... - Dynamic statistical parametric mapping for analyzing the magnetoencephalographic epileptiform activity in patients with epilepsyHideaki Shiraishi
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital Harvard Medical School, Charlestown, MA, USA
J Child Neurol 20:363-9. 2005.... - Application of magnetoencephalography in epilepsy patients with widespread spike or slow-wave activityHideaki Shiraishi
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital Harvard Medical School, Charlestown, Massachusetts, USA
Epilepsia 46:1264-72. 2005.... - Spatiotemporal brain maps of delayed word repetition and recognitionRupali P Dhond
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Room 2301, Building 149, 13th Street, Charlestown, MA 02129, USA
Neuroimage 28:293-304. 2005..Additionally, left ventromedial temporal sites may be relatively more involved in episodic retrieval, while lateral temporal sites may participate more in automatic priming... - Automatically parcellating the human cerebral cortexBruce Fischl
Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, MGH MIT Harvard Medical School, Massachusetts General Hospital, 13th Street, Charlestown, MA 02129, USA
Cereb Cortex 14:11-22. 2004..Examples are given from two different training sets generated using different neuroanatomical conventions, illustrating the flexibility of the algorithm. The technique is shown to be comparable in accuracy to manual labeling... - Reduction in distractibility with AF102B and THA in the macaqueJOSEPH O'NEILL
University of California Los Angeles Neuropsychiatric Institute 47 417A, 760 Westwood Plaza, Los Angeles, CA 90024 1759, USA
Pharmacol Biochem Behav 76:301-6. 2003..Reaction time at best dose decreased for both drugs, but not significantly. Muscarinic agonists and cholinesterase inhibitors may reduce distractibility in primates... - Specific increase of human entorhinal population synaptic and neuronal activity during retrievalSusanne Knake
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
Neuroimage 37:618-22. 2007..A double-dissociation of these responses with simultaneously recorded lateral inferotemporal recordings suggests that entorhinal cortex may be specifically engaged during retrieval, across multiple memory types and materials... - Neural substrates of tactile object recognition: an fMRI studyCatherine L Reed
Department of Psychology, University of Denver, Denver, Colorado 80208, USA
Hum Brain Mapp 21:236-46. 2004..It challenges the results of previous studies that emphasize the role of visual cortex rather than somatosensory association cortices in higher-level somatosensory cognition... - Laminar population analysis: estimating firing rates and evoked synaptic activity from multielectrode recordings in rat barrel cortexGaute T Einevoll
Department of Mathematical Sciences and Technology, Norwegian University of Life Sciences, PO Box 5003, N 1432 As, Norway
J Neurophysiol 97:2174-90. 2007..Furthermore, the time dependence of the stimulus-evoked population firing activity is predicted, and the temporal ordering of response onset is found to be compatible with earlier findings... - In vivo laminar electrophysiology co-registered with histology in the hippocampus of patients with temporal lobe epilepsyIstvan Ulbert
Institute of Experimental Medicine of the Hungarian Academy of Sciences, Budapest 1450, Hungary
Exp Neurol 187:310-8. 2004..Electrophysiological identification of the functional state of the hippocampus together with its local structural correlates could further enhance our understanding of this disease... - The relationship of regional frontal hypometabolism to executive function: a resting fluorodeoxyglucose PET study of patients with epilepsy and healthy controlsCarrie R McDonald
Multimodal Imaging Laboratory, University of California, San Diego, La Jolla, CA, USA
Epilepsy Behav 9:58-67. 2006.... - Subcortical and cerebellar atrophy in mesial temporal lobe epilepsy revealed by automatic segmentationCarrie R McDonald
Department of Psychiatry, University of California, San Diego, United States
Epilepsy Res 79:130-8. 2008..To determine the validity and utility of using automated subcortical segmentation to identify atrophy of the hippocampus and other subcortical and cerebellar structures in patients with mesial temporal lobe epilepsy (MTLE)...