O Josephs

Summary

Affiliation: University College London
Country: UK

Publications

  1. doi request reprint Event-related f MRI
    O Josephs
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London WC1N 3BG, UK
    Hum Brain Mapp 5:243-8. 1997
  2. pmc Event-related functional magnetic resonance imaging: modelling, inference and optimization
    O Josephs
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London, UK
    Philos Trans R Soc Lond B Biol Sci 354:1215-28. 1999
  3. ncbi request reprint The functional anatomy of attention to visual motion. A functional MRI study
    C Buchel
    The Wellcome Department of Cognitive Neurology, Institute of Neurology, London, UK
    Brain 121:1281-94. 1998
  4. ncbi request reprint Learning- and expectation-related changes in the human brain during motor learning
    N Ramnani
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London WC1N 3BG, United Kingdom
    J Neurophysiol 84:3026-35. 2000
  5. ncbi request reprint Blood oxygenation level dependent signal time courses during prolonged visual stimulation
    A M Howseman
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London, UK
    Magn Reson Imaging 16:1-11. 1998
  6. ncbi request reprint Does hypercapnia-induced cerebral vasodilation modulate the hemodynamic response to neural activation?
    D R Corfield
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London WC1 3BG, United Kingdom
    Neuroimage 13:1207-11. 2001
  7. ncbi request reprint Auditory processing across the sleep-wake cycle: simultaneous EEG and fMRI monitoring in humans
    C M Portas
    Wellcome Department of Cognitive Neurology, London, United Kingdom
    Neuron 28:991-9. 2000
  8. ncbi request reprint The prefrontal cortex: response selection or maintenance within working memory?
    J B Rowe
    Wellcome Department of Cognitive Neurology, Institute of Neurology, 12 Queen Square, London WC1N 3BG, UK
    Science 288:1656-60. 2000
  9. ncbi request reprint Signal-, set- and movement-related activity in the human brain: an event-related fMRI study
    I Toni
    Wellcome Department of Cognitive Neurology, Institute of Neurology, University of Oxford, UK
    Cereb Cortex 9:35-49. 1999
  10. ncbi request reprint Activity in human V1 follows multisensory perception
    S Watkins
    Wellcome Trust Centre for Neuroimaging, University College London, 12 Queen Square, London WC1N 3BG, UK
    Neuroimage 37:572-8. 2007

Detail Information

Publications18

  1. doi request reprint Event-related f MRI
    O Josephs
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London WC1N 3BG, UK
    Hum Brain Mapp 5:243-8. 1997
    ..This method allows for the experimental design to relate the timing of events to the acquisition of data to give a temporal resolution (with respect to the event-related response) far better than the scanning repeat time...
  2. pmc Event-related functional magnetic resonance imaging: modelling, inference and optimization
    O Josephs
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London, UK
    Philos Trans R Soc Lond B Biol Sci 354:1215-28. 1999
    ..Finally, we illustrate various event-related models with examples from recent studies...
  3. ncbi request reprint The functional anatomy of attention to visual motion. A functional MRI study
    C Buchel
    The Wellcome Department of Cognitive Neurology, Institute of Neurology, London, UK
    Brain 121:1281-94. 1998
    ..Given the similarity of our attentional network to that controlling eye movements, the results of this study are in accord with theories linking oculomotor control and attention...
  4. ncbi request reprint Learning- and expectation-related changes in the human brain during motor learning
    N Ramnani
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London WC1N 3BG, United Kingdom
    J Neurophysiol 84:3026-35. 2000
    ..The changes seen in the ipsilateral cerebellar cortex may be due either to the violations of sensory predictions, or to learning-related increases in the excitability of cerebellar neurons to presentations of the CS+...
  5. ncbi request reprint Blood oxygenation level dependent signal time courses during prolonged visual stimulation
    A M Howseman
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London, UK
    Magn Reson Imaging 16:1-11. 1998
    ..Our data, in accordance with that of Bandettini et al., suggest that recoupling between blood flow and oxygen extraction is not a general phenomenon in the human brain when visual stimuli are presented for an extended time...
  6. ncbi request reprint Does hypercapnia-induced cerebral vasodilation modulate the hemodynamic response to neural activation?
    D R Corfield
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London WC1 3BG, United Kingdom
    Neuroimage 13:1207-11. 2001
    ..With this flow change the effects of vasodilation, on an activation-related signal change, are simply additive...
  7. ncbi request reprint Auditory processing across the sleep-wake cycle: simultaneous EEG and fMRI monitoring in humans
    C M Portas
    Wellcome Department of Cognitive Neurology, London, United Kingdom
    Neuron 28:991-9. 2000
    ..These data suggests that the sleeping brain can process auditory stimuli and detect meaningful events...
  8. ncbi request reprint The prefrontal cortex: response selection or maintenance within working memory?
    J B Rowe
    Wellcome Department of Cognitive Neurology, Institute of Neurology, 12 Queen Square, London WC1N 3BG, UK
    Science 288:1656-60. 2000
    ..This accounts for the fact that this area is activated both when subjects select between items on working memory tasks and when they freely select between movements on tasks of willed action...
  9. ncbi request reprint Signal-, set- and movement-related activity in the human brain: an event-related fMRI study
    I Toni
    Wellcome Department of Cognitive Neurology, Institute of Neurology, University of Oxford, UK
    Cereb Cortex 9:35-49. 1999
    ..Rather, these processes seem to rely on the ventral visual stream, the ventral prefrontal cortex and the anterior part of the dorsal premotor cortex...
  10. ncbi request reprint Activity in human V1 follows multisensory perception
    S Watkins
    Wellcome Trust Centre for Neuroimaging, University College London, 12 Queen Square, London WC1N 3BG, UK
    Neuroimage 37:572-8. 2007
    ..Our findings provide strong support for the notion that human V1 activity reflects subjective perception in these multisensory illusions...
  11. ncbi request reprint Event-related fMRI with simultaneous and continuous EEG: description of the method and initial case report
    L Lemieux
    Epilepsy Research Group, Department of Clinical Neurology, University College London, Queen Square, London WC1N 3BG, UK
    Neuroimage 14:780-7. 2001
    ..The time course of activation was comparable with the physiological hemodynamic response function (HRF). The new methodology could lead to novel and important applications in many areas of neuroscience...
  12. ncbi request reprint Learning arbitrary visuomotor associations: temporal dynamic of brain activity
    I Toni
    Wellcome Department of Cognitive Neurology, Institute of Neurology, 12 Queen Square, London, WC1N 3BG, United Kingdom
    Neuroimage 14:1048-57. 2001
    ..These findings suggest the inferior temporal and the ventral prefrontal cortex are critical neural nodes for integrating perceptual information with executive processes...
  13. ncbi request reprint Action selectivity in parietal and temporal cortex
    U Noppeney
    Wellcome Department of Imaging Neuroscience, Institute of Neurology, University College London, 12 Queen Square, London WC1 3N BG, UK
    Brain Res Cogn Brain Res 25:641-9. 2005
    ..Left AIP and LPMT did not distinguish between different types of actions such as hand actions and whole body movements, although a right STS region responded selectively to whole body movements...
  14. ncbi request reprint Dissociable human perirhinal, hippocampal, and parahippocampal roles during verbal encoding
    B A Strange
    Wellcome Department of Cognitive Neurology, Institute of Neurology, London WC1N 3BG, United Kingdom
    J Neurosci 22:523-8. 2002
    ..Encoding-related parahippocampal and anterior hippocampal responses for initial, remembered words most likely reflects enhanced attentional orienting to these positionally distinctive items...
  15. ncbi request reprint Learning-related neuronal responses in prefrontal cortex studied with functional neuroimaging
    P Fletcher
    The Wellcome Department of Cognitive Neurology, Institute of Neurology, London, UK
    Cereb Cortex 9:168-78. 1999
    ..We interpret our findings in terms of a left frontal system mediating the semantic analysis of study items and directly influencing a right fronto-parietal system associated with episodic memory retrieval...
  16. pmc The impact of physiological noise correction on fMRI at 7 T
    C Hutton
    Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, UK
    Neuroimage 57:101-12. 2011
    ..This tSNR improvement translates into a significant increase in BOLD sensitivity, facilitating the study of even subtle BOLD responses...
  17. ncbi request reprint Compensation of susceptibility-induced BOLD sensitivity losses in echo-planar fMRI imaging
    R Deichmann
    Institute of Neurology, Wellcome Department of Cognitive Neurology, London WC1N 3BG, United Kingdom
    Neuroimage 15:120-35. 2002
    ..The results suggest that the compensation method allows for the detection of activation in brain areas which are usually unavailable for BOLD studies...
  18. ncbi request reprint Functional magnetic resonance imaging of proactive interference during spoken cued recall
    R N A Henson
    Institute of Neurology, University College London, United Kingdom
    Neuroimage 17:543-58. 2002
    ..These data suggest that distinct regions within prefrontal cortex subserve different functions in the presence of proactive interference during cued recall...