Amir Shmuel

Summary

Affiliation: McGill University
Country: Canada

Publications

  1. doi request reprint Mechanisms underlying decoding at 7 T: ocular dominance columns, broad structures, and macroscopic blood vessels in V1 convey information on the stimulated eye
    Amir Shmuel
    Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
    Neuroimage 49:1957-64. 2010
  2. doi request reprint Neuronal correlates of spontaneous fluctuations in fMRI signals in monkey visual cortex: Implications for functional connectivity at rest
    Amir Shmuel
    Montreal Neurological Institute, Departments of Neurology and Neurosurgery and Biomedical Engineering, McGill University, Montreal, QC, Canada
    Hum Brain Mapp 29:751-61. 2008
  3. doi request reprint Energy-based stochastic control of neural mass models suggests time-varying effective connectivity in the resting state
    Roberto C Sotero
    Montreal Neurological Institute, Departments of Neurology and Neurosurgery and Biomedical Engineering, McGill University, Montreal, Quebec, Canada
    J Comput Neurosci 32:563-76. 2012
  4. doi request reprint Evaluation and calibration of functional network modeling methods based on known anatomical connections
    Debra Ann Dawson
    Montreal Neurological Institute, Montreal, QC, Canada Department of Neurol and Neurosurg, Montreal, QC, Canada McGill University, Montreal, QC, Canada
    Neuroimage 67:331-43. 2013
  5. doi request reprint Pyramidal neurons are "neurogenic hubs" in the neurovascular coupling response to whisker stimulation
    Clotilde Lecrux
    Laboratory of Cerebrovascular Research, McGill University, Montreal, Quebec H3A 2B4, Canada
    J Neurosci 31:9836-47. 2011
  6. pmc Global and system-specific resting-state fMRI fluctuations are uncorrelated: principal component analysis reveals anti-correlated networks
    Felix Carbonell
    Brain Imaging Centre, Montreal Neurological Institute, Montreal, Canada
    Brain Connect 1:496-510. 2011
  7. ncbi request reprint Anatomically-constrained effective connectivity among layers in a cortical column modeled and estimated from local field potentials
    Roberto C Sotero
    Montreal Neurological Institute Brain Imaging Centre, Departments of Neurology and Neurosurgery and Biomedical Engineering, McGill University, Montreal, Quebec, Canada
    J Integr Neurosci 9:355-79. 2010
  8. ncbi request reprint Sustained negative BOLD, blood flow and oxygen consumption response and its coupling to the positive response in the human brain
    Amir Shmuel
    Center for Magnetic Resonance Research, University of Minnesota Medical School, Minneapolis, MN 55455, USA
    Neuron 36:1195-210. 2002
  9. ncbi request reprint Negative functional MRI response correlates with decreases in neuronal activity in monkey visual area V1
    Amir Shmuel
    Max Planck Institute for Biological Cybernetics, Spemannstr 38, 72076 Tuebingen, Germany
    Nat Neurosci 9:569-77. 2006
  10. pmc Robust detection of ocular dominance columns in humans using Hahn Spin Echo BOLD functional MRI at 7 Tesla
    Essa Yacoub
    Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota Medical School, 2021 6th Street S E, Minneapolis, MN 55455, USA
    Neuroimage 37:1161-77. 2007

Collaborators

Detail Information

Publications16

  1. doi request reprint Mechanisms underlying decoding at 7 T: ocular dominance columns, broad structures, and macroscopic blood vessels in V1 convey information on the stimulated eye
    Amir Shmuel
    Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
    Neuroimage 49:1957-64. 2010
    ..Our findings indicate that coarse-scale structures and macroscopic blood vessels contribute to decoding of the stimulated eye based on low-resolution multivariate data...
  2. doi request reprint Neuronal correlates of spontaneous fluctuations in fMRI signals in monkey visual cortex: Implications for functional connectivity at rest
    Amir Shmuel
    Montreal Neurological Institute, Departments of Neurology and Neurosurgery and Biomedical Engineering, McGill University, Montreal, QC, Canada
    Hum Brain Mapp 29:751-61. 2008
    ....
  3. doi request reprint Energy-based stochastic control of neural mass models suggests time-varying effective connectivity in the resting state
    Roberto C Sotero
    Montreal Neurological Institute, Departments of Neurology and Neurosurgery and Biomedical Engineering, McGill University, Montreal, Quebec, Canada
    J Comput Neurosci 32:563-76. 2012
    ..We further propose to employ linear NMMs with time-varying parameters as an alternative to traditional nonlinear NMMs with constant parameters...
  4. doi request reprint Evaluation and calibration of functional network modeling methods based on known anatomical connections
    Debra Ann Dawson
    Montreal Neurological Institute, Montreal, QC, Canada Department of Neurol and Neurosurg, Montreal, QC, Canada McGill University, Montreal, QC, Canada
    Neuroimage 67:331-43. 2013
    ..We propose that data-based calibration based on known anatomical connections be integrated into future network studies, in order to maximize sensitivity and reduce false positives...
  5. doi request reprint Pyramidal neurons are "neurogenic hubs" in the neurovascular coupling response to whisker stimulation
    Clotilde Lecrux
    Laboratory of Cerebrovascular Research, McGill University, Montreal, Quebec H3A 2B4, Canada
    J Neurosci 31:9836-47. 2011
    ....
  6. pmc Global and system-specific resting-state fMRI fluctuations are uncorrelated: principal component analysis reveals anti-correlated networks
    Felix Carbonell
    Brain Imaging Centre, Montreal Neurological Institute, Montreal, Canada
    Brain Connect 1:496-510. 2011
    ..In addition, we conclude that the network-specific resting-state fluctuations of the default-mode and task-positive networks show artifact-free anti-correlations...
  7. ncbi request reprint Anatomically-constrained effective connectivity among layers in a cortical column modeled and estimated from local field potentials
    Roberto C Sotero
    Montreal Neurological Institute Brain Imaging Centre, Departments of Neurology and Neurosurgery and Biomedical Engineering, McGill University, Montreal, Quebec, Canada
    J Integr Neurosci 9:355-79. 2010
    ....
  8. ncbi request reprint Sustained negative BOLD, blood flow and oxygen consumption response and its coupling to the positive response in the human brain
    Amir Shmuel
    Center for Magnetic Resonance Research, University of Minnesota Medical School, Minneapolis, MN 55455, USA
    Neuron 36:1195-210. 2002
    ..Our findings support the contribution to the NBR of (1) a significant component of reduction in neuronal activity and (2) possibly a component of hemodynamic changes independent of the local changes in neuronal activity...
  9. ncbi request reprint Negative functional MRI response correlates with decreases in neuronal activity in monkey visual area V1
    Amir Shmuel
    Max Planck Institute for Biological Cybernetics, Spemannstr 38, 72076 Tuebingen, Germany
    Nat Neurosci 9:569-77. 2006
    ..The NBR was associated with comparable decreases in local field potentials and multiunit activity. Our findings indicate that a significant component of the NBR originates in neuronal activity decreases...
  10. pmc Robust detection of ocular dominance columns in humans using Hahn Spin Echo BOLD functional MRI at 7 Tesla
    Essa Yacoub
    Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota Medical School, 2021 6th Street S E, Minneapolis, MN 55455, USA
    Neuroimage 37:1161-77. 2007
    ....
  11. ncbi request reprint Robust controlled functional MRI in alert monkeys at high magnetic field: effects of jaw and body movements
    Georgios A Keliris
    Max Planck Institute for Biological Cybernetics, Spemannstr 38, 72076 Tuebingen, Germany
    Neuroimage 36:550-70. 2007
    ..It is anticipated that the techniques presented here will prove useful for alert monkey fMRI at any magnetic field...
  12. ncbi request reprint Functional MR imaging in the awake monkey: effects of motion on dynamic off-resonance and processing strategies
    Josef Pfeuffer
    Max Planck Institute for Biological Cybernetics, Department Physiology of Cognitive Processes, 72076 Tubingen, Germany
    Magn Reson Imaging 25:869-82. 2007
    ..Highly activated voxels also displayed good reproducibility between trials. On average, the BOLD amplitude response to a short 3-s visual stimulus was close to 2%...
  13. ncbi request reprint Retinotopic axis specificity and selective clustering of feedback projections from V2 to V1 in the owl monkey
    Amir Shmuel
    Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
    J Neurosci 25:2117-31. 2005
    ..We conclude that the feedback connections from V2 to V1 might play a role in enhancing the response in V1 to collinear contour elements...
  14. ncbi request reprint Signal and noise characteristics of Hahn SE and GE BOLD fMRI at 7 T in humans
    Essa Yacoub
    Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
    Neuroimage 24:738-50. 2005
    ..It was concluded that HSE imaging yields a significantly reduced amount of nonspecific signals compared to GE imaging, and, would be the method of choice (over GE) for high-resolution applications in humans...
  15. ncbi request reprint The spatial pattern of response magnitude and selectivity for orientation and direction in cat visual cortex
    Nicholas V Swindale
    Department of Ophthalmology and Visual Sciences, University of British Columbia, 2550 Willow Street, Vancouver, BC, Canada V5Z 3N9
    Cereb Cortex 13:225-38. 2003
    ..Orientation and direction preference angles are always closely orthogonal. Reversals in direction preference form lines that originate precisely in orientation singularities...
  16. ncbi request reprint Zoomed functional imaging in the human brain at 7 Tesla with simultaneous high spatial and high temporal resolution
    Josef Pfeuffer
    Center for Magnetic Resonance Research, University of Minnesota Medical School, 2021 6th Street S E, Minneapolis, Minnesota 55455, USA
    Neuroimage 17:272-86. 2002
    ..The magnetization transfer effect induced by the outer-volume suppression pulses was investigated and found to be increased during neuronal activity...