Research Topics
| Giorgio BonmassarSummaryAffiliation: Harvard University Country: USA Publications
Research Grants
| Collaborators
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Detail Information
Publications
Motion and ballistocardiogram artifact removal for interleaved recording of EEG and EPs during MRIGiorgio Bonmassar
NMR Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, USA
Neuroimage 16:1127-41. 2002..Our adaptive filter approach can be implemented in real-time to allow for continuous monitoring of EEG and fMRI during clinical and cognitive studies...- Spatiotemporal brain imaging of visual-evoked activity using interleaved EEG and fMRI recordingsG Bonmassar
NMR Center, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA
Neuroimage 13:1035-43. 2001..This type of simultaneous acquisition and analysis allows for the accurate characterization of the location and timing of neurophysiological activity in the human brain... 
PTFOS: flexible and absorbable intracranial electrodes for magnetic resonance imagingGiorgio Bonmassar
AA Martinos Center, Harvard Medical School, Massachusetts General Hospital, Charlestown, Massachusetts, United States of America
PLoS ONE 7:e41187. 2012..The enhanced image quality could enable routine MRI exams of patients with intracranial electrode implantation and could also lead to chronic implantation solutions...- Influence of EEG electrodes on the BOLD fMRI signalG Bonmassar
A Martinos Center, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA
Hum Brain Mapp 14:108-15. 2001..The results demonstrate that the BOLD signal is not influenced by the presence of EEG electrodes when using a properly constructed MRI compatible recording cap... - Specific absorption rate studies of the parallel transmission of inner-volume excitations at 7TAdam C Zelinski
Massachusetts Institute of Technology, Research Laboratory of Electronics, Cambridge, Massachusetts, USA
J Magn Reson Imaging 28:1005-18. 2008..To investigate the behavior of whole-head and local specific absorption rate (SAR) as a function of trajectory acceleration factor and target excitation pattern due to the parallel transmission (pTX) of spatially tailored excitations at 7T... - EEG/(f)MRI measurements at 7 Tesla using a new EEG cap ("InkCap")Christos E Vasios
Harvard Medical School, Massachusetts General Hospital, Athinoula A Martinos Center for Biomedical Imaging, Building 149, 13th Street, Charlestown 02129, USA
Neuroimage 33:1082-92. 2006..Our results show that the InkCap technology considerably improves the quality of both EEG and (f)MRI during concurrent measurements even at 7 T... - Task-modulated "what" and "where" pathways in human auditory cortexJyrki Ahveninen
Harvard Medical School Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, CNY 149 13th Street, Charlestown, MA 02129, USA
Proc Natl Acad Sci U S A 103:14608-13. 2006..This finding suggests that selective-attention effects are feature-specific in the human nonprimary auditory cortex and that they arise from enhanced tuning of receptive fields of task-relevant neuronal populations... - An open-source hardware and software system for acquisition and real-time processing of electrophysiology during high field MRIPatrick L Purdon
Department of Anesthesia and Critical Care, Massachusetts General Hospital, Charlestown, MA 02129, USA
J Neurosci Methods 175:165-86. 2008.... - Bottom-up dependent gating of frontal signals in early visual cortexLeeland B Ekstrom
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA 02129, USA
Science 321:414-7. 2008..We conclude that bottom-up activation is needed to enable top-down modulation of early visual cortex and that stimulus saliency determines the strength of this modulation... 
Atlas-based segmentation for globus pallidus internus targeting on low-resolution MRIMaria I Iacono
AA Martinos Center for Biomedical Imaging, Dept of Radiology, MGH, Charlestown, MA, USA
Conf Proc IEEE Eng Med Biol Soc 2011:5706-9. 2011..The mapping of the atlas on the low-resolution MRI provided a highly accurate anatomical detail that can be useful for localizing the target...- On the effect of resistive EEG electrodes and leads during 7 T MRI: simulation and temperature measurement studiesLeonardo M Angelone
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Magn Reson Imaging 24:801-12. 2006.... - MRI-based anatomical model of the human head for specific absorption rate mappingNikos Makris
Department of Psychiatry, Neurology and Radiology Services, Center for Morphometric Analysis, HST Athinoula A Martinos Center, Harvard Medical School, Massachusetts General Hospital, Boston, MA 02129, USA
Med Biol Eng Comput 46:1239-51. 2008.... - Basal ganglia activity remains elevated after movement in focal hand dystoniaAnne J Blood
Department of Neurology, Massachusetts General Hospital, Charlestown, MA 02129, USA
Ann Neurol 55:744-8. 2004..We posit that inhibitory control of the basal ganglia may be faulty in focal hand dystonia, and that the increases we observe in "resting" activity may mask basal ganglia abnormalities in standard imaging contrast analyses... - Location-specific cortical activation changes during sleep after training for perceptual learningYuko Yotsumoto
Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, 149 13th Street, Charlestown, MA 02129, USA
Curr Biol 19:1278-82. 2009..These results suggest that as far as V1 is concerned, only the trained region is involved in improving task performance after sleep... - Metallic electrodes and leads in simultaneous EEG-MRI: specific absorption rate (SAR) simulation studiesLeonardo M Angelone
MGH MIT HMS Athinoula A Martinos Center for Functional Imaging, Charlestown, Massachusetts 02129, USA
Bioelectromagnetics 25:285-95. 2004..4) increase in the skin. At 128 MHz, there was a fivefold (x5.6) increase of whole head SAR. Head models were obtained from two different subjects, with an inter-subject whole head SAR variability of 3%. ... - Simultaneous electroencephalography and functional magnetic resonance imaging of general anesthesiaPatrick L Purdon
Department of Anesthesia and Critical Care, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
Ann N Y Acad Sci 1157:61-70. 2009.... - Coupling between somatosensory evoked potentials and hemodynamic response in the ratMaria Angela Franceschini
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, 13th Street Bldg 149 room 2301, Charlestown, MA 02129, USA
Neuroimage 41:189-203. 2008..The N1 and P2 components, and not P1, need to be considered to correctly interpret neurovascular coupling... - Finger motion sensors for fMRI motor studiesJudith D Schaechter
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, 13th Street, Building 149, Room 2301, Charlestown, MA 02129, USA
Neuroimage 31:1549-59. 2006.... - Microscopic magnetic stimulation of neural tissueGiorgio Bonmassar
Athinoula A Martinos Center for Biomedical Imaging, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA 02129, USA
Nat Commun 3:921. 2012..These results raise the possibility that micro-magnetic stimulation coils, small enough to be implanted within the brain parenchyma, may prove to be an effective alternative to existing stimulation devices... - Human posterior auditory cortex gates novel sounds to consciousnessIiro P Jaaskelainen
Massachusetts General Hospital, Massachusetts Institute of Technology, Harvard Medical School, Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Proc Natl Acad Sci U S A 101:6809-14. 2004..Our converging findings suggest that transient adaptation of feature-specific neurons within human posterior auditory cortex filters superfluous sounds from entering one's awareness...
Research Grants
- Concurrent EEG and fMRI Studies in Human Brain ActivityGiorgio Bonmassar; Fiscal Year: 2005..We propose a series of simultaneous fMRI/EEG experiments that will investigate the spatial location and temporal processing of event-related potentials in the human brain. ..
- Simultaneous fMRI and Electrophysiology in Visual SystemGiorgio Bonmassar; Fiscal Year: 2007..The final system for general electrophysiology during MRI will become a high impact tool for vision research, given the worldwide lack of commercially available MR-compatible systems for electrophysiological recording. ..