Affiliation: Harvard University
- Differences in cortical response to acupressure and electroacupuncture stimuliThomas Witzel
Harvard Medical School, Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
BMC Neurosci 12:73. 2011..We used whole head magnetoencephalography (MEG) to map S1 brain response during 15 minutes of electroacupuncture (EA) and acupressure (AP). We further assessed how brain response changed during the course of stimulation...
- Stimulus-induced Rotary Saturation (SIRS): a potential method for the detection of neuronal currents with MRIThomas Witzel
Speech and Hearing Bioscience and Technology Program, Harvard MIT Division of Health Sciences and Technology, USA
Neuroimage 42:1357-65. 2008..Magn. Reson. Med. 50, 40-49], but is potentially less encumbered by temporal and spatial cancellation effects...
- Cancellation of EEG and MEG signals generated by extended and distributed sourcesSeppo P Ahlfors
Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital Harvard Medical School, Charlestown, 02129, USA
Hum Brain Mapp 31:140-9. 2010..Furthermore, the selective cancellation may be used to explain some observed differences between EEG and MEG in terms of focal vs. widespread cortical activity...
- Onset timing of cross-sensory activations and multisensory interactions in auditory and visual sensory corticesTommi Raij
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Bldg 149, 13 St, Charlestown, MA, USA
Eur J Neurosci 31:1772-82. 2010..Audiovisual interactions started at 85 ms in the left auditory, 80 ms in the right auditory and 74 ms in the visual cortex, i.e., 3-21 ms after inputs from the two modalities converged...
- Assessing and improving the spatial accuracy in MEG source localization by depth-weighted minimum-norm estimatesFa Hsuan Lin
MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Building 149 13th St Charlestown, MA 02129, USA
Neuroimage 31:160-71. 2006..The application of depth weighting to auditory and somatosensory experimental data illustrated the beneficial effect of depth weighting on the accuracy of spatiotemporal mapping of neuronal sources...
- Spatio-temporal mapping cortical neuroplasticity in carpal tunnel syndromeRupali P Dhond
Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
Brain 135:3062-73. 2012..These temporal magnetoencephalography measures are novel markers of neuroplasticity in carpal tunnel syndrome and could be used to study central changes that may occur following clinical intervention...
- 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....
- 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...
- Event-related single-shot volumetric functional magnetic resonance inverse imaging of visual processingFa Hsuan Lin
MGH HST Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Neuroimage 42:230-47. 2008..Robust results from both single subject and group analyses demonstrate the sensitivity and feasibility of using volumetric InI in high temporal resolution investigations of human brain function...
- Spatiotemporal mapping the neural correlates of acupuncture with MEGRupali P Dhond
MGH MIT HMS Martinos Center for Biomedical Imaging, Charlestown, Massachusetts 02129, USA
J Altern Complement Med 14:679-88. 2008..Thus, MEG provides excellent spatiotemporal characterization of the somatosensory component of acupuncture, and future studies can contrast derived brain response parameters in healthy controls with those found in a diseased state...
- Blipped-controlled aliasing in parallel imaging for simultaneous multislice echo planar imaging with reduced g-factor penaltyKawin Setsompop
Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA
Magn Reson Med 67:1210-24. 2012..We demonstrate the potential of the method for accelerating diffusion imaging by comparing the fiber orientation uncertainty, where the 3-fold faster acquisition showed no noticeable degradation...
- A non-invasive method to relate the timing of neural activity to white matter microstructural integritySteven M Stufflebeam
Department of Radiology at the Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
Neuroimage 42:710-6. 2008..This preliminary report demonstrates a non-invasive, unbiased method to relate the timing information from evoked-response experiments to the biophysical properties of white matter measured with DTI...
- GABA-ergic modulation of prefrontal spatio-temporal activation pattern during emotional processing: a combined fMRI/MEG study with placebo and lorazepamGeorg Northoff
Department of Neurology, Section of Behavioral Neurology, Beth Israel Deaconess Medical Center, Harvard University, Kirstein Building KS 454, 330 Brookline Avenue, Boston, 02215 MA, USA
J Cogn Neurosci 14:348-70. 2002..Such a modulation of orbito-frontal cortical emotional function by lorazepam has to be distinguished from its effects on cortical motor function as being independent from the kind of processing either emotional or nonemotional...
- Linear constraint minimum variance beamformer functional magnetic resonance inverse imagingFa Hsuan Lin
Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
Neuroimage 43:297-311. 2008..Robust results from both single subject and group analyses demonstrate the excellent sensitivity and specificity of volumetric InI in detecting the spatial and temporal structure of task-related brain activity...
- 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...
- Spectral spatiotemporal imaging of cortical oscillations and interactions in the human brainFa Hsuan Lin
MGH MIT MHS Athinoula A Martinos Center for Biomedical Imaging, 13th Street, Charlestown, MA 02129, USA
Neuroimage 23:582-95. 2004..Spectral spatiotemporal imaging of cortical oscillations and interactions in the human brain can provide further understanding of large-scale neural activity and communication between different brain regions...
- Accelerated radiation damping for increased spin equilibrium (ARISE): a new method for controlling the recovery of longitudinal magnetizationSusie Y Huang
Department of Radiology, Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, USA
Magn Reson Med 60:1112-21. 2008..Unlike conventional flip-back schemes, the ARISE "flip-back" is generated by the spins themselves, thereby offering a potentially useful building block for enhancing GRE sequences...
- Quantitative oxygenation venography from MRI phaseAudrey P Fan
Magnetic Resonance Imaging Group, Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts, USA
Magn Reson Med 72:149-59. 2014..To demonstrate acquisition and processing methods for quantitative oxygenation venograms that map in vivo oxygen saturation (SvO2 ) along cerebral venous vasculature...
- 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...