Srikantan Nagarajan

Summary

Affiliation: University of California
Country: USA

Publications

  1. ncbi request reprint Application of an MEG eigenspace beamformer to reconstructing spatio-temporal activities of neural sources
    Kensuke Sekihara
    Department of Electronic Systems and Engineering, Tokyo Metropolitan Institute of Technology, Asahigaoka 6 6, Hino, Tokyo 191 0065, Japan
    Hum Brain Mapp 15:199-215. 2002
  2. pmc Cognitive Impairments in Schizophrenia as Assessed Through Activation and Connectivity Measures of Magnetoencephalography (MEG) Data
    Leighton B N Hinkley
    Department of Radiology and Biomedical Imaging, University of California San Francisco, CA, USA
    Front Hum Neurosci 3:73. 2010
  3. pmc Functional connectivity in relation to motor performance and recovery after stroke
    Kelly P Westlake
    Biomagnetic Imaging Laboratory, Department of Radiology and Biomedical Imaging, University of California San Francisco CA, USA
    Front Syst Neurosci 5:8. 2011
  4. pmc Spatiotemporal integration of tactile information in human somatosensory cortex
    Zhao Zhu
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California, San Francisco, San Francisco, CA, 94143 0628, USA
    BMC Neurosci 8:21. 2007
  5. pmc The relationship between magnetic and electrophysiological responses to complex tactile stimuli
    Zhao Zhu
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
    BMC Neurosci 10:4. 2009
  6. pmc Speech target modulates speaking induced suppression in auditory cortex
    Maria I Ventura
    Department of Otolaryngology, University of California, San Francisco, San Francisco, CA, USA
    BMC Neurosci 10:58. 2009
  7. ncbi request reprint Preoperative localization of hand motor cortex by adaptive spatial filtering of magnetoencephalography data
    Srikantan Nagarajan
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California, San Francisco, California 94143 0628, USA
    J Neurosurg 109:228-37. 2008
  8. ncbi request reprint A probabilistic algorithm integrating source localization and noise suppression for MEG and EEG data
    Johanna M Zumer
    Biomagnetic Imaging Lab, Department of Radiology, University of California, San Francisco, San Francisco, CA 94143 0628, USA
    Neuroimage 37:102-15. 2007
  9. pmc Accurate reconstruction of brain activity and functional connectivity from noisy MEG data
    Julia P Owen
    Biomagnetic Imaging Laboratory, Dept Radiology and Biomedical Imaging, UCSF San Francisco, CA, USA
    Conf Proc IEEE Eng Med Biol Soc 2009:65-8. 2009
  10. pmc Computerized cognitive training restores neural activity within the reality monitoring network in schizophrenia
    Karuna Subramaniam
    San Francisco Department of Veterans Affairs Medical Center and Department of Psychiatry, University of California, San Francisco, San Francisco, CA 94121, USA
    Neuron 73:842-53. 2012

Research Grants

  1. Cortical spatiotemporal plasticity in humans
    Srikantan S Nagarajan; Fiscal Year: 2010
  2. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2009
  3. Neural mechanisms of auditory feedback during speech
    Srikantan Nagarajan; Fiscal Year: 2004
  4. Neural mechanisms of auditory feedback during speech
    Srikantan Nagarajan; Fiscal Year: 2006
  5. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2004
  6. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2003
  7. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2009
  8. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2002
  9. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2009
  10. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2007

Detail Information

Publications57

  1. ncbi request reprint Application of an MEG eigenspace beamformer to reconstructing spatio-temporal activities of neural sources
    Kensuke Sekihara
    Department of Electronic Systems and Engineering, Tokyo Metropolitan Institute of Technology, Asahigaoka 6 6, Hino, Tokyo 191 0065, Japan
    Hum Brain Mapp 15:199-215. 2002
    ..Such a prewhitened eigenspace beamformer was experimentally demonstrated to be useful when large background activity exists...
  2. pmc Cognitive Impairments in Schizophrenia as Assessed Through Activation and Connectivity Measures of Magnetoencephalography (MEG) Data
    Leighton B N Hinkley
    Department of Radiology and Biomedical Imaging, University of California San Francisco, CA, USA
    Front Hum Neurosci 3:73. 2010
    ....
  3. pmc Functional connectivity in relation to motor performance and recovery after stroke
    Kelly P Westlake
    Biomagnetic Imaging Laboratory, Department of Radiology and Biomedical Imaging, University of California San Francisco CA, USA
    Front Syst Neurosci 5:8. 2011
    ..Overall findings suggest that a network level assessment provides a useful framework to examine brain reorganization and to potentially better predict behavioral outcomes following stroke...
  4. pmc Spatiotemporal integration of tactile information in human somatosensory cortex
    Zhao Zhu
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California, San Francisco, San Francisco, CA, 94143 0628, USA
    BMC Neurosci 8:21. 2007
    ....
  5. pmc The relationship between magnetic and electrophysiological responses to complex tactile stimuli
    Zhao Zhu
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
    BMC Neurosci 10:4. 2009
    ..Stimuli were applied to the fingertips with three inter-stimulus intervals (ISIs): 0.33s, 1s and 2s...
  6. pmc Speech target modulates speaking induced suppression in auditory cortex
    Maria I Ventura
    Department of Otolaryngology, University of California, San Francisco, San Francisco, CA, USA
    BMC Neurosci 10:58. 2009
    ....
  7. ncbi request reprint Preoperative localization of hand motor cortex by adaptive spatial filtering of magnetoencephalography data
    Srikantan Nagarajan
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California, San Francisco, California 94143 0628, USA
    J Neurosurg 109:228-37. 2008
    ....
  8. ncbi request reprint A probabilistic algorithm integrating source localization and noise suppression for MEG and EEG data
    Johanna M Zumer
    Biomagnetic Imaging Lab, Department of Radiology, University of California, San Francisco, San Francisco, CA 94143 0628, USA
    Neuroimage 37:102-15. 2007
    ..Success of this algorithm using MEG data for localizing bilateral auditory cortex, low-SNR somatosensory activations, and for localizing an epileptic spike source are also demonstrated...
  9. pmc Accurate reconstruction of brain activity and functional connectivity from noisy MEG data
    Julia P Owen
    Biomagnetic Imaging Laboratory, Dept Radiology and Biomedical Imaging, UCSF San Francisco, CA, USA
    Conf Proc IEEE Eng Med Biol Soc 2009:65-8. 2009
    ..We demonstrate that brain source activity inferred from this algorithm is better suited to uncover the interactions between brain areas as compared to other commonly used source localization algorithms...
  10. pmc Computerized cognitive training restores neural activity within the reality monitoring network in schizophrenia
    Karuna Subramaniam
    San Francisco Department of Veterans Affairs Medical Center and Department of Psychiatry, University of California, San Francisco, San Francisco, CA 94121, USA
    Neuron 73:842-53. 2012
    ..These findings demonstrate that a serious behavioral deficit in schizophrenia, and its underlying neural dysfunction, can be improved by well-designed computerized cognitive training, resulting in better quality of life...
  11. pmc MEG in the macaque monkey and human: distinguishing cortical fields in space and time
    Johanna M Zumer
    Department of Radiology, University of California, San Francisco, CA, USA
    Brain Res 1345:110-24. 2010
    ..We thus demonstrate the feasibility of using MEG in the macaque monkey and provide a non-human primate model for examining the relationship between external evoked magnetic fields and their underlying neural sources...
  12. pmc Mapping functional connectivity in patients with brain lesions
    Adrian G Guggisberg
    Biomagnetic Imaging Lab, Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
    Ann Neurol 63:193-203. 2008
    ..Based on the rationale that damaged brain tissue is disconnected from the physiological interactions among healthy areas, this study aimed to map the functionality of brain areas according to their connectivity with other areas...
  13. pmc Five-dimensional neuroimaging: localization of the time-frequency dynamics of cortical activity
    Sarang S Dalal
    Department of Radiology, University of California, San Francisco, CA 94143 0628, USA
    Neuroimage 40:1686-700. 2008
    ..This method enables the ultimate promise of MEG and EEG for five-dimensional imaging of space, time, and frequency activity in the brain and renders it applicable for widespread studies of human cortical dynamics during cognition...
  14. pmc Timing is everything: neural response dynamics during syllable processing and its relation to higher-order cognition in schizophrenia and healthy comparison subjects
    Corby L Dale
    Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA
    Int J Psychophysiol 75:183-93. 2010
    ....
  15. ncbi request reprint Functional organization and hemispheric comparison of primary auditory cortex in the common marmoset (Callithrix jacchus)
    Bénédicte Philibert
    Coleman Memorial Laboratory and W M Keck Center for Integrative Neuroscience, Department of Otolaryngology Head and Neck Surgery, University of California, San Francisco, San Francisco, California 94143 0732, USA
    J Comp Neurol 487:391-406. 2005
    ..The overall results indicate that the basic functional organization between hemispheres is similar but not identical...
  16. pmc Robust Bayesian estimation of the location, orientation, and time course of multiple correlated neural sources using MEG
    David P Wipf
    Department of Radiology and Biomedical Imaging, University of California San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143, USA
    Neuroimage 49:641-55. 2010
    ..Empirical results on both simulated and real data sets verify the efficacy of this approach...
  17. pmc Comparison of time-frequency responses and the event-related potential to auditory speech stimuli in human cortex
    Erik Edwards
    Department of Psychology and Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA, USA
    J Neurophysiol 102:377-86. 2009
    ..Across electrodes, the alpha suppression from 200 to 450 ms correlated with the preceding (50-200 ms) gammahigh increase. The results are discussed in terms of the different physiological origins of these electrocortical signals...
  18. ncbi request reprint Neural mechanisms of the time-order error: an MEG study
    Ilana S Hairston
    Department of Psychology, University of California, Berkeley, CA 94720, USA
    J Cogn Neurosci 19:1163-74. 2007
    ..This was observed only in the two 5-Hz conditions. Combined, these results suggest that the TOE reflects the emergence of an internal representation of the standard, and that the M300 is potentially a neural correlate of plasticity...
  19. pmc Localization of neurosurgically implanted electrodes via photograph-MRI-radiograph coregistration
    Sarang S Dalal
    Biomagnetic Imaging Laboratory, Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA 94143 0628, USA
    J Neurosci Methods 174:106-15. 2008
    ..We demonstrate the results of our method in eight epilepsy patients implanted with electrode grids spanning the left hemisphere...
  20. pmc A graphical model for estimating stimulus-evoked brain responses from magnetoencephalography data with large background brain activity
    Srikantan S Nagarajan
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California at San Francisco, San Francisco, CA 94122, USA
    Neuroimage 30:400-16. 2006
    ..We demonstrate on real and simulated data that the algorithm outperforms benchmark methods for denoising and separation. We also show that the algorithm improves the performance of localization with beamforming algorithms...
  21. pmc Magnetoencephalographic evidence for a precise forward model in speech production
    Theda H Heinks-Maldonado
    Department of Otolaryngology, University of California, San Francisco, California 94143, USA
    Neuroreport 17:1375-9. 2006
    ..This suggests that the feedback comparison process may be very precise, allowing the auditory system to distinguish between internal and external sources of auditory information...
  22. ncbi request reprint Intensive cognitive training in schizophrenia enhances working memory and associated prefrontal cortical efficiency in a manner that drives long-term functional gains
    Karuna Subramaniam
    Department of Psychiatry, University of California, San Francisco, CA 94121, USA Electronic address
    Neuroimage 99:281-92. 2014
    ....
  23. ncbi request reprint Modulation of the auditory cortex during speech: an MEG study
    John F Houde
    Center for Integrative Neuroscience, University of California, San Francisco 94143, USA
    J Cogn Neurosci 14:1125-38. 2002
    ..These data suggest that during speech production, the auditory cortex (1) attenuates its sensitivity and (2) modulates its activity as a function of the expected acoustic feedback...
  24. doi request reprint Neuroimaging characteristics of patients with focal hand dystonia
    Leighton B N Hinkley
    Department of Radiology, University of California, San Francisco, San Francisco, California 94143 0628, USA
    J Hand Ther 22:125-34; quiz 135. 2009
    ..Continued collaborations between health professionals who treat FHd and research scientists who examine the brain using neuroimaging tools are imperative for answering difficult questions about patients with specific movement disorders...
  25. pmc Correlation of clinical neuromusculoskeletal and central somatosensory performance: variability in controls and patients with severe and mild focal hand dystonia
    Nancy N Byl
    Dept of Physical Therapy and Rehabilitation Science, School of Medicine, University of California, San Francisco, California 94143 0736, USA
    Neural Plast 9:177-203. 2002
    ..Training must be individualized to each patient to rebalance the sensorimotor feedback loop and to restore normal fine motor control...
  26. pmc Controlled Support MEG imaging
    Srikantan S Nagarajan
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California at San Francisco, San Francisco, CA 94122, USA
    Neuroimage 33:878-85. 2006
    ..The paper discusses the underlying Tikhonov theory and its relationship to a Bayesian formulation which in turn allows us to interpret and better understand other related algorithms...
  27. ncbi request reprint Accuracy of diffusion tensor magnetic resonance imaging tractography assessed using intraoperative subcortical stimulation mapping and magnetic source imaging
    Jeffrey I Berman
    Department of Radiology, University of California, San Francisco 94107, USA
    J Neurosurg 107:488-94. 2007
    ..The goal of this study was to use intraoperative subcortical stimulation mapping of the motor tract and magnetic source imaging to validate the utility of DT-imaged fiber tracking as a tool for presurgical planning...
  28. pmc Magnetic source imaging for the surgical evaluation of electroencephalography-confirmed secondary bilateral synchrony in intractable epilepsy
    Edward F Chang
    Department of Neurological Surgery, University of California, San Francisco, 505 Parnassus Avenue, Room M779, San Francisco, California 94143, USA
    J Neurosurg 111:1248-56. 2009
    ..Whole-head magnetoencephalography (MEG) has superior spatial resolution compared with traditional EEG, and can potentially elucidate seizure foci in challenging epilepsy cases in which patients are undergoing evaluation for surgery...
  29. pmc Subcortical pathways serving cortical language sites: initial experience with diffusion tensor imaging fiber tracking combined with intraoperative language mapping
    Roland G Henry
    Department of Radiology, University of California, San Francisco, San Francisco, CA 94143, USA
    Neuroimage 21:616-22. 2004
    ..The combined techniques may provide improved preservation of eloquent regions during neurological surgery, and may provide access to direct connectivity information between functional regions of the brain...
  30. pmc Plasticity in primary auditory cortex of monkeys with altered vocal production
    Steven W Cheung
    Coleman Memorial Laboratory and W M Keck Center for Integrative Neuroscience, Department of Otolaryngology Head and Neck Surgery, University of California, San Francisco, California 94143 0342, USA
    J Neurosci 25:2490-503. 2005
    ..These findings suggest a previously unrecognized form of cortical plasticity that is specific to higher-order processes involved in the discrimination of more complex sounds, such as species-specific vocalizations...
  31. pmc A probabilistic algorithm for robust interference suppression in bioelectromagnetic sensor data
    Srikantan S Nagarajan
    Department of Radiology, University of California at San Francisco, 513 Parnassus Avenue 5362, San Francisco, CA 94122, USA
    Stat Med 26:3886-910. 2007
    ..This algorithm is found to be robust and efficient and significantly superior to many other existing approaches on real and simulated data...
  32. pmc Modified beamformers for coherent source region suppression
    Sarang S Dalal
    UCSF Berkeley Joint Graduate Group in Bioengineering, Department of Radiology, University of California, San Francisco, CA 94143 0628, USA
    IEEE Trans Biomed Eng 53:1357-63. 2006
    ..After defining a suppression region containing the temporal cortex on one side, the described method consistently results in clear focal activations at expected regions of the contralateral superior temporal plane...
  33. pmc Spatiotemporal imaging of cortical activation during verb generation and picture naming
    Erik Edwards
    Department of Psychology and Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA
    Neuroimage 50:291-301. 2010
    ..The data are discussed with regards to current leading models of speech perception and production, and a "dual ventral stream" hybrid of leading speech perception models is given...
  34. doi request reprint Probabilistic algorithms for MEG/EEG source reconstruction using temporal basis functions learned from data
    Johanna M Zumer
    Biomagnetic Imaging Lab, Department of Radiology, University of California, San Francisco, San Francisco, CA 94143 0628, USA
    Neuroimage 41:924-40. 2008
    ..Performance in simulations and real data, both with large noise and interference and/or correlated sources, demonstrates significant improvement over existing source localization methods...
  35. pmc Concordance between routine interictal magnetoencephalography and simultaneous scalp electroencephalography in a sample of patients with epilepsy
    Heidi E Kirsch
    UCSF Epilepsy Center, Department of Neurology, University of California, San Francisco, CA 94143 0138, USA
    J Clin Neurophysiol 24:215-31. 2007
    ..In some cases, EEG and MEG are synergistic and provide complementary information...
  36. pmc When top-down meets bottom-up: auditory training enhances verbal memory in schizophrenia
    R Alison Adcock
    Duke University Department of Psychiatry and Center for Cognitive Neuroscience, University of California, San Francisco, CA, USA
    Schizophr Bull 35:1132-41. 2009
    ..We conclude with the observation that neuroplasticity-based cognitive training brings patients closer to physiological patterns seen in healthy participants, suggesting that it changes the brain in an adaptive manner in schizophrenia...
  37. pmc A unified Bayesian framework for MEG/EEG source imaging
    David Wipf
    Biomagnetic Imaging Lab, University of California San Francisco, San Francisco, CA 94143, USA
    Neuroimage 44:947-66. 2009
    ....
  38. pmc Fast oscillations associated with interictal spikes localize the epileptogenic zone in patients with partial epilepsy
    Adrian G Guggisberg
    Biomagnetic Imaging Laboratory, Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
    Neuroimage 39:661-8. 2008
    ..Imaging of spike-locked beta/gamma power changes therefore seems to be a reliable and fast alternative to conventional MEG techniques for localizing epileptogenic tissue, in particular, if more than 50 interictal spikes can be recorded...
  39. ncbi request reprint Chronic stroke survivors achieve comparable outcomes following virtual task specific repetitive training guided by a wearable robotic orthosis (UL-EXO7) and actual task specific repetitive training guided by a physical therapist
    Nancy N Byl
    Department of Physical Therapy and Rehabilitation Medicine, School of Medicine, University of California, San Francisco, USA Electronic address
    J Hand Ther 26:343-52; quiz 352. 2013
    ....
  40. pmc Sensory representation abnormalities that parallel focal hand dystonia in a primate model
    David T Blake
    Coleman Laboratory, Keck Center for Integrative Neuroscience, and Department of Otolaryngology Head and Neck Surgery, University of California, San Francisco, USA
    Somatosens Mot Res 19:347-57. 2002
    ..Thalamic mapping demonstrated proportionate levels of abnormality in thalamic representations as were found in cortical representations...
  41. ncbi request reprint Performance comparison of six independent components analysis algorithms for fetal signal extraction from real fMCG data
    Kenneth E Hild
    Department of Radiology, University of California at San Francisco, San Francisco, CA 94122, USA
    Phys Med Biol 52:449-62. 2007
    ..It is possible to explain these differences by assuming that the number of point sources needed to completely explain the data is larger than the dimensionality used in the ICA extraction...
  42. pmc Source localization of EEG/MEG data by correlating columns of ICA and lead field matrices
    Kenneth E Hild
    Department of Radiology, University of California at San Francisco, San Francisco, CA 94143, USA
    IEEE Trans Biomed Eng 56:2619-26. 2009
    ..We show that, when synthetic data are used, the proposed localization method produces a smaller localization error than several alternatives. We also show localization results for real auditory-evoked MEG data...
  43. pmc An expectation-maximization method for spatio-temporal blind source separation using an AR-MOG source model
    Kenneth E Hild
    Department of Radiology, The University of California at San Francisco, San Francisco, CA 94143, USA
    IEEE Trans Neural Netw 19:508-19. 2008
    ..We also show results for using AR-MOG to extract the fetal cardiac signal from real magnetocardiographic (MCG) data...
  44. pmc A simple nonparametric statistical thresholding for MEG spatial-filter source reconstruction images
    Kensuke Sekihara
    Department of Systems Design and Engineering, Tokyo Metropolitan University, Asahigaoka 6 6, Hino, Tokyo 191 0065, Japan
    Neuroimage 27:368-76. 2005
    ..The results of applying the proposed method to auditory-evoked measurements are presented to demonstrate the method's effectiveness...
  45. pmc Localization bias and spatial resolution of adaptive and non-adaptive spatial filters for MEG source reconstruction
    Kensuke Sekihara
    Department of Electronic Systems and Engineering, Tokyo Metropolitan Institute of Technology, Asahigaoka 6 6, Hino, Tokyo 191 0065, Japan
    Neuroimage 25:1056-67. 2005
    ..The results of these analyses are validated by numerical experiments as well as by reconstructions based on two sets of evoked magnetic responses...
  46. pmc Asymptotic SNR of scalar and vector minimum-variance beamformers for neuromagnetic source reconstruction
    Kensuke Sekihara
    Department of Electronic Systems and Engineering, Tokyo Metropolitan Institute of Technology, Tokyo 191 0065, Japan
    IEEE Trans Biomed Eng 51:1726-34. 2004
    ..The comparison shows that the beamformer with optimum direction gives an output SNR superior to that of the conventional vector beamformer. Numerical examples validating the results of the analysis are presented...
  47. ncbi request reprint Predicting the location of mouth motor cortex in patients with brain tumors by using somatosensory evoked field measurements
    Heidi E Kirsch
    University of California San Francisco Epilepsy Center, Department of Neurology, USA
    J Neurosurg 107:481-7. 2007
    ..Preoperative localization of face somatosensory cortex with magnetoencephalography (MEG) may allow the surgeon to predict the location of mouth motor areas...
  48. ncbi request reprint Analysis of efficiency of magnetic stimulation
    Kai Hsiung Hsu
    Neural Engineering Center, Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
    IEEE Trans Biomed Eng 50:1276-85. 2003
    ..Moreover, the cloverleaf design achieves the highest efficiency for infinitely long fibers whereas the butterfly design is optimal for terminating or bending fibers...
  49. ncbi request reprint Performance of an MEG adaptive-beamformer technique in the presence of correlated neural activities: effects on signal intensity and time-course estimates
    Kensuke Sekihara
    Department of Electronic Systems and Engineering, Tokyo Metropolitan Institute of Technology, Tokyo 191 0065, Japan
    IEEE Trans Biomed Eng 49:1534-46. 2002
    ..Our numerical experiments demonstrated that reasonably accurate time courses can be retrieved from considerably distorted time courses even when the signal-to-noise ratio is low...
  50. ncbi request reprint Performance of an MEG adaptive-beamformer source reconstruction technique in the presence of additive low-rank interference
    Kensuke Sekihara
    Department of Electronic Systems and Engineering, Tokyo Metropolitan Institute of Technology, Asahigaoka 6 6, Hino, Tokyo 191 0065, Japan
    IEEE Trans Biomed Eng 51:90-9. 2004
    ..Four types of numerical examples verifying this conclusion are presented...
  51. pmc A novel adaptive beamformer for MEG source reconstruction effective when large background brain activities exist
    Kensuke Sekihara
    Department of Systems Design and Engineering, Tokyo Metropolitan University, Japan
    IEEE Trans Biomed Eng 53:1755-64. 2006
    ..A numerical example, as well as applications to two types of MEG data, demonstrates the effectiveness of the proposed method...
  52. pmc Motor field sensitivity for preoperative localization of motor cortex
    Peter T Lin
    Department of Neurology, Stanford Hospital and Clinics, Stanford, California, USA
    J Neurosurg 105:588-94. 2006
    ..In this study the role of magnetic source imaging for preoperative motor mapping was evaluated by using a single-dipole localization method to analyze motor field data in 41 patients...
  53. pmc Sensorimotor integration in S2, PV, and parietal rostroventral areas of the human sylvian fissure
    Leighton B Hinkley
    Center for Neuroscience, University of California Davis, 1544 Newton Court, Davis, CA 95618, USA
    J Neurophysiol 97:1288-97. 2007
    ....
  54. pmc Auditory cortical plasticity in learning to discriminate modulation rate
    Virginie van Wassenhove
    Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
    J Neurosci 27:2663-72. 2007
    ..Functional plasticity in auditory cortex is here interpreted as the product of bottom-up and top-down modulations...
  55. ncbi request reprint Spatial localization of cortical time-frequency dynamics
    Sarang S Dalal
    Mental Processes and Brain Activation Lab, INSERM U821, 69675 Bron, France
    Conf Proc IEEE Eng Med Biol Soc 2007:4941-4. 2007
    ..This method enables non-invasive five-dimensional imaging of space, time, and frequency activity in the brain and renders it applicable for widespread studies of human cortical dynamics...
  56. ncbi request reprint Representation of spectral and temporal envelope of twitter vocalizations in common marmoset primary auditory cortex
    Srikantan S Nagarajan
    Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112 9458, USA
    J Neurophysiol 87:1723-37. 2002
    ..Neurophysiological data reflecting response sensitivity in AI to these forms of degradation closely parallel human psychophysical results on the intelligibility of degraded speech in quiet and noisy conditions...

Research Grants17

  1. Cortical spatiotemporal plasticity in humans
    Srikantan S Nagarajan; Fiscal Year: 2010
    ..By comparing characteristics of behavioral improvements with cortical plasticity we propose to unravel general rules of cortical spatiotemporal plasticity associated with auditory perceptual learning. ..
  2. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2009
    ..By comparing characteristics of behavioral improvements with cortical plasticity we propose to unravel general rules of cortical spatiotemporal plasticity associated with auditory perceptual learning. ..
  3. Neural mechanisms of auditory feedback during speech
    Srikantan Nagarajan; Fiscal Year: 2004
    ....
  4. Neural mechanisms of auditory feedback during speech
    Srikantan Nagarajan; Fiscal Year: 2006
    ....
  5. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2004
    ..These results in normal individuals should provide crucial information for the development, refinement and evaluation of diagnosis and therapy for individuals with learning disability. ..
  6. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2003
    ..These results in normal individuals should provide crucial information for the development, refinement and evaluation of diagnosis and therapy for individuals with learning disability. ..
  7. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2009
    ..By comparing characteristics of behavioral improvements with cortical plasticity we propose to unravel general rules of cortical spatiotemporal plasticity associated with auditory perceptual learning. ..
  8. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2002
    ..These results in normal individuals should provide crucial information for the development, refinement and evaluation of diagnosis and therapy for individuals with learning disability. ..
  9. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2009
    ..By comparing characteristics of behavioral improvements with cortical plasticity we propose to unravel general rules of cortical spatiotemporal plasticity associated with auditory perceptual learning. ..
  10. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2007
    ..By comparing characteristics of behavioral improvements with cortical plasticity we propose to unravel general rules of cortical spatiotemporal plasticity associated with auditory perceptual learning. ..
  11. Neural mechanisms of auditory feedback during speech
    Srikantan Nagarajan; Fiscal Year: 2007
    ....
  12. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2003
    ..These results in normal individuals should provide crucial information for the development, refinement and evaluation of diagnosis and therapy for individuals with learning disability. ..
  13. Neural mechanisms of auditory feedback during speech
    Srikantan Nagarajan; Fiscal Year: 2005
    ....
  14. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2004
    ..These results in normal individuals should provide crucial information for the development, refinement and evaluation of diagnosis and therapy for individuals with learning disability. ..
  15. Cortical spatiotemporal plasticity in humans
    Srikantan Nagarajan; Fiscal Year: 2002
    ..These results in normal individuals should provide crucial information for the development, refinement and evaluation of diagnosis and therapy for individuals with learning disability. ..