Nikolaus Weiskopf

Summary

Affiliation: University College London
Country: UK

Publications

  1. ncbi request reprint Self-regulation of local brain activity using real-time functional magnetic resonance imaging (fMRI)
    Nikolaus Weiskopf
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tubingen, Germany
    J Physiol Paris 98:357-73. 2004
  2. pmc Improved segmentation of deep brain grey matter structures using magnetization transfer (MT) parameter maps
    Gunther Helms
    MR Research in Neurology and Psychiatry, University Medical Center, Gottingen, Germany
    Neuroimage 47:194-8. 2009
  3. ncbi request reprint Optimal EPI parameters for reduction of susceptibility-induced BOLD sensitivity losses: a whole-brain analysis at 3 T and 1.5 T
    Nikolaus Weiskopf
    Wellcome Department of Imaging Neuroscience, Institute of Neurology, University College London, London, WC1N 3BG, UK
    Neuroimage 33:493-504. 2006
  4. ncbi request reprint Real-time functional magnetic resonance imaging: methods and applications
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, WC1N 3BG London, UK
    Magn Reson Imaging 25:989-1003. 2007
  5. pmc Image artifacts in concurrent transcranial magnetic stimulation (TMS) and fMRI caused by leakage currents: modeling and compensation
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, United Kingdom
    J Magn Reson Imaging 29:1211-7. 2009
  6. pmc Optimized EPI for fMRI studies of the orbitofrontal cortex: compensation of susceptibility-induced gradients in the readout direction
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, London, WC1N 3BG, UK
    MAGMA 20:39-49. 2007
  7. pmc Unified segmentation based correction of R1 brain maps for RF transmit field inhomogeneities (UNICORT)
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, UK
    Neuroimage 54:2116-24. 2011
  8. pmc Choking on the money: reward-based performance decrements are associated with midbrain activity
    Dean Mobbs
    Wellcome Trust Centre for Neuroimaging, Functional Imaging Laboratory, University College London, UK
    Psychol Sci 20:955-62. 2009
  9. pmc The role of contralesional dorsal premotor cortex after stroke as studied with concurrent TMS-fMRI
    Sven Bestmann
    Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, University College London, London, United Kingdom
    J Neurosci 30:11926-37. 2010
  10. pmc Degeneration of the injured cervical cord is associated with remote changes in corticospinal tract integrity and upper limb impairment
    Patrick Freund
    Department of Brain Repair and Rehabilitation, University College London Institute of Neurology, University College London, London, United Kingdom
    PLoS ONE 7:e51729. 2012

Collaborators

Detail Information

Publications69

  1. ncbi request reprint Self-regulation of local brain activity using real-time functional magnetic resonance imaging (fMRI)
    Nikolaus Weiskopf
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tubingen, Germany
    J Physiol Paris 98:357-73. 2004
    ..Voluntary control of abnormal activity in circumscribed brain areas may even be applied as psychophysiological treatment...
  2. pmc Improved segmentation of deep brain grey matter structures using magnetization transfer (MT) parameter maps
    Gunther Helms
    MR Research in Neurology and Psychiatry, University Medical Center, Gottingen, Germany
    Neuroimage 47:194-8. 2009
    ..Our results show that MT maps are highly suitable for automated segmentation, and so for multi-subject morphometric studies with a focus on subcortical structures...
  3. ncbi request reprint Optimal EPI parameters for reduction of susceptibility-induced BOLD sensitivity losses: a whole-brain analysis at 3 T and 1.5 T
    Nikolaus Weiskopf
    Wellcome Department of Imaging Neuroscience, Institute of Neurology, University College London, London, WC1N 3BG, UK
    Neuroimage 33:493-504. 2006
    ..g., encompassing the medial OFC, can be increased by more than 15%. The maps of optimal parameters allow for assessing the feasibility and improving fMRI of brain regions affected by susceptibility-induced BS losses...
  4. ncbi request reprint Real-time functional magnetic resonance imaging: methods and applications
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, WC1N 3BG London, UK
    Magn Reson Imaging 25:989-1003. 2007
    ....
  5. pmc Image artifacts in concurrent transcranial magnetic stimulation (TMS) and fMRI caused by leakage currents: modeling and compensation
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, United Kingdom
    J Magn Reson Imaging 29:1211-7. 2009
    ....
  6. pmc Optimized EPI for fMRI studies of the orbitofrontal cortex: compensation of susceptibility-induced gradients in the readout direction
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, London, WC1N 3BG, UK
    MAGMA 20:39-49. 2007
    ..Here, BOLD sensitivity losses due to susceptibility- induced gradients in the readout (RO) direction are characterized and a compensation approach is developed...
  7. pmc Unified segmentation based correction of R1 brain maps for RF transmit field inhomogeneities (UNICORT)
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, UK
    Neuroimage 54:2116-24. 2011
    ..UNICORT is easy to apply, as it is computationally efficient and its basic framework is implemented as part of the tissue segmentation in SPM8...
  8. pmc Choking on the money: reward-based performance decrements are associated with midbrain activity
    Dean Mobbs
    Wellcome Trust Centre for Neuroimaging, Functional Imaging Laboratory, University College London, UK
    Psychol Sci 20:955-62. 2009
    ..These data cast light on the neurobiological basis of choking under pressure and are consistent with overmotivation accounts...
  9. pmc The role of contralesional dorsal premotor cortex after stroke as studied with concurrent TMS-fMRI
    Sven Bestmann
    Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, University College London, London, United Kingdom
    J Neurosci 30:11926-37. 2010
    ..cPMd TMS was not found to influence activity in other brain regions in either hemisphere. This state-dependent influence on ipsilesional sensorimotor regions may provide a mechanism by which cPMd supports recovered function after stroke...
  10. pmc Degeneration of the injured cervical cord is associated with remote changes in corticospinal tract integrity and upper limb impairment
    Patrick Freund
    Department of Brain Repair and Rehabilitation, University College London Institute of Neurology, University College London, London, United Kingdom
    PLoS ONE 7:e51729. 2012
    ....
  11. ncbi request reprint Neuronal mechanisms underlying control of a brain-computer interface
    Thilo Hinterberger
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tubingen, Gartenstrasse 29, D 72074 Tubingen, Germany
    Eur J Neurosci 21:3169-81. 2005
    ..This skill depends critically on an intact and flexible interaction between the cortico-basal ganglia-thalamic circuits...
  12. ncbi request reprint An EEG-driven brain-computer interface combined with functional magnetic resonance imaging (fMRI)
    Thilo Hinterberger
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tubingen, Tubingen 72076, Germany
    IEEE Trans Biomed Eng 51:971-4. 2004
    ..The technical aspects and pitfalls of combined fMRI data acquisition and EEG neurofeedback are discussed. First data of SCP feedback during fMRI are presented...
  13. pmc Hemispheric differences in frontal and parietal influences on human occipital cortex: direct confirmation with concurrent TMS-fMRI
    Christian C Ruff
    Institute of Cognitive Neuroscience, University College London, London, UK
    J Cogn Neurosci 21:1146-61. 2009
    ..These data directly confirm that the human frontal and parietal cortex show right-hemisphere specialization for causal influences on the visual cortex...
  14. pmc Detecting representations of recent and remote autobiographical memories in vmPFC and hippocampus
    Heidi M Bonnici
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, London, WC1N 3BG, United Kingdom
    J Neurosci 32:16982-91. 2012
    ..Overall, these findings clarify and extend our view of vmPFC and hippocampus while also informing systems-level consolidation and providing clear targets for future studies...
  15. pmc The human amygdala is sensitive to the valence of pictures and sounds irrespective of arousal: an fMRI study
    Silke Anders
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tubingen, Germany
    Soc Cogn Affect Neurosci 3:233-43. 2008
    ....
  16. ncbi request reprint Regulation of anterior insular cortex activity using real-time fMRI
    Andrea Caria
    Institute of Medical Psychology and Behavioral Neurobiology, Eberhard Karls University of Tubingen, Tubingen, Germany
    Neuroimage 35:1238-46. 2007
    ..This is the first group study investigating the volitional control of emotionally relevant brain region by using rtfMRI training and confirms that self-regulation of local brain activity with rtfMRI is possible...
  17. ncbi request reprint Regulation of emotional responses elicited by threat-related stimuli
    Falk Eippert
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tuebingen, Germany
    Hum Brain Mapp 28:409-23. 2007
    ..The present study demonstrates that amygdala responses to threat-related stimuli can be controlled through the use of cognitive strategies depending on recruitment of prefrontal areas, thereby changing the subject's affective state...
  18. pmc Interhemispheric effect of parietal TMS on somatosensory response confirmed directly with concurrent TMS-fMRI
    Felix Blankenburg
    Institute of Cognitive Neuroscience, University College London, London, United Kingdom
    J Neurosci 28:13202-8. 2008
    ....
  19. pmc When fear is near: threat imminence elicits prefrontal-periaqueductal gray shifts in humans
    Dean Mobbs
    Wellcome Trust Centre for Neuroimaging, Functional Imaging Laboratory, University College London, London WC1N 3BG, UK
    Science 317:1079-83. 2007
    ..Our findings cast light on the neural dynamics of threat anticipation and have implications for the neurobiology of human anxiety-related disorders...
  20. pmc Improving visual perception through neurofeedback
    Frank Scharnowski
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, and UCL Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, United Kingdom
    J Neurosci 32:17830-41. 2012
    ..Our new approach allows us to non-invasively and non-pharmacologically manipulate regionally specific brain activity and thus provide "brain training" to deliver particular perceptual enhancements...
  21. pmc Correction of vibration artifacts in DTI using phase-encoding reversal (COVIPER)
    Siawoosh Mohammadi
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, United Kingdom
    Magn Reson Med 68:882-9. 2012
    ..COVIPER can be combined with other corrections based on phase encoding reversal, providing a comprehensive correction for eddy currents, susceptibility-related distortions and vibration artifact reduction...
  22. pmc Axonal integrity predicts cortical reorganisation following cervical injury
    Patrick Freund
    Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London WC1N 3BG, UK
    J Neurol Neurosurg Psychiatry 83:629-37. 2012
    ..Traumatic spinal cord injury (SCI) leads to disruption of axonal architecture and macroscopic tissue loss with impaired information flow between the brain and spinal cord-the presumed basis of ensuing clinical impairment...
  23. ncbi request reprint Principles of a brain-computer interface (BCI) based on real-time functional magnetic resonance imaging (fMRI)
    Nikolaus Weiskopf
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tubingen, Tubingen, Germany
    IEEE Trans Biomed Eng 51:966-70. 2004
    ..Technical and experimental aspects are discussed with respect to neurofeedback. The methodology now allows for studying behavioral effects and strategies of local self-regulation in healthy and diseased subjects...
  24. pmc Disability, atrophy and cortical reorganization following spinal cord injury
    Patrick Freund
    Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, UCL, Queen Square, London WC1N 3BG, UK
    Brain 134:1610-22. 2011
    ..The degree of cortical reorganization is predicted by spinal atrophy and is associated with significant disability...
  25. ncbi request reprint Physiological self-regulation of regional brain activity using real-time functional magnetic resonance imaging (fMRI): methodology and exemplary data
    Nikolaus Weiskopf
    Institute of Medical Psychology and Behavioural Neurobiology, University of Tubingen, Tubingen, Germany
    Neuroimage 19:577-86. 2003
    ..This methodology of fMRI-feedback can assess voluntary control of circumscribed brain areas. As a further extension, behavioral effects of local self-regulation become accessible as a new field of research...
  26. pmc Decoding representations of scenes in the medial temporal lobes
    Heidi M Bonnici
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London, United Kingdom
    Hippocampus 22:1143-53. 2012
    ....
  27. pmc Decoding individual episodic memory traces in the human hippocampus
    Martin J Chadwick
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London WC1N3BG, UK
    Curr Biol 20:544-7. 2010
    ..Finally, our data provide further evidence for functional differentiation within the medial temporal lobe, in that we show the hippocampus contains significantly more episodic information than adjacent structures...
  28. pmc Retrospective correction of physiological noise in DTI using an extended tensor model and peripheral measurements
    Siawoosh Mohammadi
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, UK
    Magn Reson Med 70:358-69. 2013
    ..The proposed extended tensor model can be readily combined with other artefact correction methods such as robust fitting and eddy current correction...
  29. doi request reprint High-resolution functional MRI at 3 T: 3D/2D echo-planar imaging with optimized physiological noise correction
    Antoine Lutti
    Wellcome Trust Centre for Neuroimaging, Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, University College London, London, United Kingdom
    Magn Reson Med 69:1657-64. 2013
    ..5 mm high-resolution fMRI at 3 T, increasing the temporal signal-to-noise ratio by more than 25% compared to two-dimensional EPI...
  30. pmc The Kuleshov Effect: the influence of contextual framing on emotional attributions
    Dean Mobbs
    Wellcome Department of Imaging Neuroscience, Functional Imaging Laboratory, University College London, London, UK
    Soc Cogn Affect Neurosci 1:95-106. 2006
    ..These prefrontal regions may act to guide appropriate choices across altering contexts. Together, these findings offer a neurobiological basis for contextual framing effects on social attributions...
  31. pmc Dorsal premotor cortex exerts state-dependent causal influences on activity in contralateral primary motor and dorsal premotor cortex
    Sven Bestmann
    Wellcome Trust Centre for Neuroimaging at UCL, Institute of Neurology, University College London, London, UK
    Cereb Cortex 18:1281-91. 2008
    ..We conclude that left PMd can exert state-dependent interhemispheric influences on contralateral cortical motor areas relevant for a current motor task...
  32. ncbi request reprint Single-shot compensation of image distortions and BOLD contrast optimization using multi-echo EPI for real-time fMRI
    Nikolaus Weiskopf
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tubingen, Tubingen, Germany
    Neuroimage 24:1068-79. 2005
    ..Significant reduction in geometric distortion is shown both for phantom images and human fMRI data. Moreover, sensitivity to the blood oxygen level-dependent (BOLD) effect is increased by weighted summation of the undistorted images...
  33. pmc Using high angular resolution diffusion imaging data to discriminate cortical regions
    Zoltan Nagy
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, United Kingdom
    PLoS ONE 8:e63842. 2013
    ..Our approach allows for further studies on the consistency of HARDI based parcellation across subjects and comparison with independent microstructural measures such as ex-vivo histology...
  34. pmc Modelling temporal stability of EPI time series using magnitude images acquired with multi-channel receiver coils
    Chloe Hutton
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, United Kingdom
    PLoS ONE 7:e52075. 2012
    ..In particular, the extended model improves the prediction of low to medium tSNR values and so can play an important role in the optimization of high-resolution fMRI experiments at lower SNR levels...
  35. doi request reprint Mapping causal interregional influences with concurrent TMS-fMRI
    Sven Bestmann
    Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, University College London, London, UK
    Exp Brain Res 191:383-402. 2008
    ..This can provide powerful new insights about causal interactions among brain regions in both health and disease that may ultimately lead to developing more efficient protocols for basic research and therapeutic TMS applications...
  36. pmc Evidence of mirror neurons in human inferior frontal gyrus
    James M Kilner
    The Wellcome Trust Centre for Neuroimaging, Institute of Neurology, UCL, London, United Kingdom
    J Neurosci 29:10153-9. 2009
    ..This pattern of responses is consistent with that predicted by mirror neurons and is evidence of mirror neurons in the human IFG...
  37. pmc Multi-voxel pattern analysis in human hippocampal subfields
    Heidi M Bonnici
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London London, UK
    Front Hum Neurosci 6:290. 2012
    ..We suggest that MVPA in human hippocampal subfields may open up new opportunities to examine how different types of information are represented and processed at this fundamental level...
  38. pmc Robust and fast whole brain mapping of the RF transmit field B1 at 7T
    Antoine Lutti
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, United Kingdom
    PLoS ONE 7:e32379. 2012
    ..The mean accuracy and precision of the optimized method across the brain was high with a bias less than 2.6 percent unit (p.u.) and random error less than 0.7 p.u. respectively...
  39. pmc Anterolateral prefrontal cortex mediates the analgesic effect of expected and perceived control over pain
    Katja Wiech
    Wellcome Department of Imaging Neuroscience, Institute of Neurology, London WC1N 3BG, United Kingdom
    J Neurosci 26:11501-9. 2006
    ..Failure to activate right alPFC may explain the maladaptive effects of strong general control beliefs during uncontrollable pain...
  40. pmc Optimization and validation of methods for mapping of the radiofrequency transmit field at 3T
    Antoine Lutti
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, UK
    Magn Reson Med 64:229-38. 2010
    ..The 3D EPI method showed the highest level of reproducibility. The 2D STEAM method was the most time-efficient technique...
  41. pmc Efficient fat suppression by slice-selection gradient reversal in twice-refocused diffusion encoding
    Zoltan Nagy
    Wellcome Trust Centre for Neuroimaging at University College London, Institute of Neurology, University College London, London, UK
    Magn Reson Med 60:1256-60. 2008
    ..Unwanted fat signal was entirely suppressed with this method without affecting the water signal intensity or the slice profile...
  42. pmc A comparison between voxel-based cortical thickness and voxel-based morphometry in normal aging
    Chloe Hutton
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK
    Neuroimage 48:371-80. 2009
    ..We therefore propose that used together, these techniques can separate the underlying grey matter changes, highlighting the utility of combining these complementary methods...
  43. pmc A stable sparse fear memory trace in human amygdala
    Dominik R Bach
    Wellcome Trust Centre for Neuroimaging, University College London, London WC1N 3BG, United Kingdom
    J Neurosci 31:9383-9. 2011
    ..A sparse neuronal representation for fear, here revealed by multivariate pattern classification, resolves why an enduring memory trace has proven elusive in previous human studies...
  44. pmc Decoding neuronal ensembles in the human hippocampus
    Demis Hassabis
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK
    Curr Biol 19:546-54. 2009
    ..How activity across millions of hippocampal neurons supports these functions is a fundamental question in neuroscience, wherein the size, sparseness, and organization of the hippocampal neural code are debated...
  45. doi request reprint Connectivity changes underlying neurofeedback training of visual cortex activity
    Frank Scharnowski
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, United Kingdom UCL Institute of Cognitive Neuroscience, University College London, London, United Kingdom Institute of Bioengineering, Swiss Institute of Technology Lausanne EPFL, Lausanne, Switzerland Department of Radiology and Medical Informatics CIBM, University of Geneva, Geneva, Switzerland
    PLoS ONE 9:e91090. 2014
    ..These results are consistent with efficient employment of top-down visual attention and imagery, which were the cognitive strategies used by participants to increase their visual cortex activity. ..
  46. pmc The impact of post-processing on spinal cord diffusion tensor imaging
    Siawoosh Mohammadi
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, UK
    Neuroimage 70:377-85. 2013
    ..The higher quality of FA maps allows for a better distinction between grey and white matter without increasing scan time and is compatible with any multi-directional DTI acquisition scheme...
  47. pmc MRI investigation of the sensorimotor cortex and the corticospinal tract after acute spinal cord injury: a prospective longitudinal study
    Patrick Freund
    Spinal Cord Injury Center Balgrist, University Hospital Zurich, University of Zurich, Zurich, Switzerland
    Lancet Neurol 12:873-81. 2013
    ..We aimed to use MRI to assess neuronal degeneration above the level of the lesion after acute spinal cord injury...
  48. pmc Dissociable roles of human inferior frontal gyrus during action execution and observation
    Clare Press
    The Wellcome Trust Centre for Neuroimaging, Institute of Neurology, UCL, 12 Queen Square, London, WC1N 3BG, UK
    Neuroimage 60:1671-7. 2012
    ..Activation may instead reflect alternative mechanisms, such as encoding of the semantic features of actions...
  49. pmc Causal evidence for frontal involvement in memory target maintenance by posterior brain areas during distracter interference of visual working memory
    Eva Feredoes
    Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, United Kingdom
    Proc Natl Acad Sci U S A 108:17510-5. 2011
    ..These results provide a new line of causal evidence for a top-down DLPFC-based control mechanism that promotes successful maintenance of relevant information in WM in the presence of distraction...
  50. pmc Threatening a rubber hand that you feel is yours elicits a cortical anxiety response
    H Henrik Ehrsson
    Wellcome Department of Imaging Neuroscience, Institute of Neurology, 12 Queen Square, London WC1N 3BG, United Kingdom
    Proc Natl Acad Sci U S A 104:9828-33. 2007
    ..These findings are of fundamental importance because they suggest that the feeling of body ownership is associated with changes in the interoceptive systems...
  51. pmc Voxel-based morphometry reveals reduced grey matter volume in the temporal cortex of developmental prosopagnosics
    Lucia Garrido
    Institute of Cognitive Neuroscience, Alexandra House, 17 Queen Square, London WC1N3AR, UK
    Brain 132:3443-55. 2009
    ....
  52. pmc Distinct causal influences of parietal versus frontal areas on human visual cortex: evidence from concurrent TMS-fMRI
    Christian C Ruff
    UCL Institute of Cognitive Neuroscience, 17 Queen Square, London WC1N 3AR, UK
    Cereb Cortex 18:817-27. 2008
    ..Our results show directly that parietal and frontal regions can indeed have distinct patterns of causal influence upon functional activity in human visual cortex...
  53. pmc The effect of local perturbation fields on human DTI: characterisation, measurement and correction
    Siawoosh Mohammadi
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, UK
    Neuroimage 60:562-70. 2012
    ..We demonstrate the importance of the proposed correction by showing improved consistency across scanners, different head positions and an increased FA contrast between grey and white matter...
  54. pmc Comparing hemodynamic models with DCM
    Klaas Enno Stephan
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK, and Brain Dynamics Center, Westmead Millenium Institute, Westmead Hospital, NSW, Australia
    Neuroimage 38:387-401. 2007
    ..Using fMRI data from a group of twelve subjects, we demonstrate that the best model is a non-linear model with a revised form for the coefficients, in which epsilon is treated as a free parameter...
  55. pmc Deep and superficial amygdala nuclei projections revealed in vivo by probabilistic tractography
    Dominik R Bach
    Wellcome Trust Centre for Neuroimaging, London WC1N 3BG, UK
    J Neurosci 31:618-23. 2011
    ..We propose that connectivity profiles provide a potentially powerful approach for in vivo amygdala parcellation and can serve as a guide in studies that exploit functional and anatomical neuroimaging...
  56. doi request reprint Phase informed model for motion and susceptibility
    Chloe Hutton
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, United Kingdom
    Hum Brain Mapp 34:3086-100. 2013
    ..The PIMMS method can be used with any standard EPI sequence for which accurate phase information is available...
  57. doi request reprint Real-time fMRI and its application to neurofeedback
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK
    Neuroimage 62:682-92. 2012
    ..The initial results in patient populations improving pain, tinnitus, depression or modulating perception in schizophrenia are encouraging and merit further controlled clinical studies...
  58. pmc In vivo functional and myeloarchitectonic mapping of human primary auditory areas
    Frederic Dick
    Birkbeck UCL Centre for NeuroImaging, London WC1E 7HX, United Kingdom
    J Neurosci 32:16095-105. 2012
    ..The multimodal approach to defining the auditory core will facilitate investigations of structure-function relationships, comparative neuroanatomical studies, and promises new biomarkers for diagnosis and clinical studies...
  59. pmc Context-dependent human extinction memory is mediated by a ventromedial prefrontal and hippocampal network
    Raffael Kalisch
    Wellcome Department of Imaging Neuroscience, Functional Imaging Laboratory, Institute of Neurology, University College London, London, WC1N 3BG, United Kingdom
    J Neurosci 26:9503-11. 2006
    ..Thus, a VMPFC-hippocampal network provides for context-dependent recall of human extinction memory, consistent with a view that hippocampus confers context dependence on VMPFC...
  60. ncbi request reprint Infrared oculography-validation of a new method to monitor startle eyeblink amplitudes during fMRI
    Silke Anders
    Institute of Medical Psychology and Behavioral Neurobiology, University of Tubingen, Germany
    Neuroimage 22:767-70. 2004
    ..Thus, IOG provides a valid method to record startle eyeblinks and might be used to monitor affective state during fMRI...
  61. pmc A method for improving the performance of gradient systems for diffusion-weighted MRI
    Zoltan Nagy
    Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, London, UK
    Magn Reson Med 58:763-8. 2007
    ..The scaling factor is the square root of the ratio of the expected and observed diffusion constants. In addition, fiber tracking results in the human brain were noticeably affected by improving the gradient system calibration...
  62. ncbi request reprint Mismatch responses to randomized gradient switching noise as reflected by fMRI and whole-head magnetoencephalography
    Klaus Mathiak
    Department of Neuroradiology, University of Tubingen, Germany
    Hum Brain Mapp 16:190-5. 2002
    ..The presented paradigm provides a robust and feasible tool to study the functional anatomy of early cognitive auditory processing in clinical populations such as schizophrenia...
  63. ncbi request reprint Dynamic causal modeling: a generative model of slice timing in fMRI
    Stefan J Kiebel
    The Wellcome Department of Imaging Neuroscience, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3AR, UK
    Neuroimage 34:1487-96. 2007
    ..We apply our procedure to real data and show that slice timings are important parameters. We conclude that, generally, one should use DCM with slice timing...
  64. pmc Quantitative multi-parameter mapping of R1, PD(*), MT, and R2(*) at 3T: a multi-center validation
    Nikolaus Weiskopf
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London London, UK
    Front Neurosci 7:95. 2013
    ..The reliability, short acquisition time, high resolution and the detailed insights into the brain microstructure provided by MPM makes it an efficient tool for multi-center imaging studies...
  65. pmc Quantitative magnetization transfer in in vivo healthy human skeletal muscle at 3 T
    Christopher D J Sinclair
    MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, Queen Square, London, United Kingdom
    Magn Reson Med 64:1739-48. 2010
    ..9 ± 0.2 μs in the soleus muscle and the restricted proton pool fraction was 8 ± 1%. Quantitative magnetization transfer imaging of muscle offers potential new biomarkers in muscle disease within a clinically feasible scan time...
  66. pmc Processing of inconsistent emotional information: an fMRI study
    Giuseppina Rota
    Institute for Natural Language Processing, University of Stuttgart, Azenbergstrasse 12, 70174, Stuttgart, Germany
    Exp Brain Res 186:401-7. 2008
    ..This evidence confirms previous research investigating the neuronal network that supports the processing of emotional information...
  67. ncbi request reprint Benign partial epilepsy in childhood: selective cognitive deficits are related to the location of focal spikes determined by combined EEG/MEG
    Markus Wolff
    Department of Neuropediatrics, University Children s Hospital, Tuebingen, Germany
    Epilepsia 46:1661-7. 2005
    ..Magnetoencephalography (MEG) improves the accuracy of spike localization. Therefore by using combined MEG/EEG, we investigated the topographic relation between focal spikes and neuropsychological findings in children with BPE...
  68. ncbi request reprint Motor affordance and its role for visual working memory: evidence from fMRI studies
    Axel Mecklinger
    Department of Psychology, Saarland University, Saarbrucken, Germany
    Exp Psychol 51:258-69. 2004
    ....
  69. ncbi request reprint Mismatch negativity responses in schizophrenia: a combined fMRI and whole-head MEG study
    Tilo T J Kircher
    University of Tübingen Department of Psychiatry, Germany
    Am J Psychiatry 161:294-304. 2004
    ..Mismatch negativity response is diminished in patients with schizophrenia. Little is known about the mechanisms of this decreased response, the contribution of the different hemispheres, and its locus of generation...