Thomas Witzel

Summary

Affiliation: Harvard University
Country: USA

Publications

  1. pmc Differences in cortical response to acupressure and electroacupuncture stimuli
    Thomas Witzel
    Harvard Medical School, Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
    BMC Neurosci 12:73. 2011
  2. pmc Stimulus-induced Rotary Saturation (SIRS): a potential method for the detection of neuronal currents with MRI
    Thomas Witzel
    Speech and Hearing Bioscience and Technology Program, Harvard MIT Division of Health Sciences and Technology, USA
    Neuroimage 42:1357-65. 2008
  3. pmc Onset timing of cross-sensory activations and multisensory interactions in auditory and visual sensory cortices
    Tommi 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
  4. pmc Cancellation of EEG and MEG signals generated by extended and distributed sources
    Seppo 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
  5. pmc Spatiotemporal mapping the neural correlates of acupuncture with MEG
    Rupali P Dhond
    MGH MIT HMS Martinos Center for Biomedical Imaging, Charlestown, Massachusetts 02129, USA
    J Altern Complement Med 14:679-88. 2008
  6. pmc Linear constraint minimum variance beamformer functional magnetic resonance inverse imaging
    Fa Hsuan Lin
    Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
    Neuroimage 43:297-311. 2008
  7. pmc Event-related single-shot volumetric functional magnetic resonance inverse imaging of visual processing
    Fa Hsuan Lin
    MGH HST Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
    Neuroimage 42:230-47. 2008
  8. pmc Task-modulated "what" and "where" pathways in human auditory cortex
    Jyrki 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
  9. pmc Spatiotemporal cortical dynamics underlying abstract and concrete word reading
    Rupali P Dhond
    MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
    Hum Brain Mapp 28:355-62. 2007
  10. ncbi request reprint Assessing and improving the spatial accuracy in MEG source localization by depth-weighted minimum-norm estimates
    Fa 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

Detail Information

Publications13

  1. pmc Differences in cortical response to acupressure and electroacupuncture stimuli
    Thomas 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...
  2. pmc Stimulus-induced Rotary Saturation (SIRS): a potential method for the detection of neuronal currents with MRI
    Thomas 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...
  3. pmc Onset timing of cross-sensory activations and multisensory interactions in auditory and visual sensory cortices
    Tommi 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...
  4. pmc Cancellation of EEG and MEG signals generated by extended and distributed sources
    Seppo 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...
  5. pmc Spatiotemporal mapping the neural correlates of acupuncture with MEG
    Rupali 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...
  6. pmc Linear constraint minimum variance beamformer functional magnetic resonance inverse imaging
    Fa 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...
  7. pmc Event-related single-shot volumetric functional magnetic resonance inverse imaging of visual processing
    Fa 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...
  8. pmc Task-modulated "what" and "where" pathways in human auditory cortex
    Jyrki 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...
  9. pmc Spatiotemporal cortical dynamics underlying abstract and concrete word reading
    Rupali P Dhond
    MGH MIT HMS Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
    Hum Brain Mapp 28:355-62. 2007
    ....
  10. ncbi request reprint Assessing and improving the spatial accuracy in MEG source localization by depth-weighted minimum-norm estimates
    Fa 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...
  11. pmc Spatiotemporal brain maps of delayed word repetition and recognition
    Rupali 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...
  12. ncbi request reprint Spatiotemporal maps of past-tense verb inflection
    Rupali 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...
  13. ncbi request reprint GABA-ergic modulation of prefrontal spatio-temporal activation pattern during emotional processing: a combined fMRI/MEG study with placebo and lorazepam
    Georg 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...