Christian C Ruff
Affiliation: University College London
- Neural coding of tactile decisions in the human prefrontal cortexBurkhard Pleger
Wellcome Center of Neuroimaging, University College London, London WC1N 3AR, United Kingdom
J Neurosci 26:12596-601. 2006..Our findings suggest that activity in the left DLPFC encodes stimulus representations that underlie veridical tactile decisions in humans...
- Reasoning and working memory: common and distinct neuronal processesChristian C Ruff
Centre for Cognitive Science, Albert Ludwigs University Freiburg, Freiburg, Germany
Neuropsychologia 41:1241-53. 2003....
- Combining TMS and fMRI: from 'virtual lesions' to functional-network accounts of cognitionChristian C Ruff
UCL Institute of Cognitive Neuroscience, London, UK
Cortex 45:1043-9. 2009....
- Attentional preparation for a lateralized visual distractor: behavioral and fMRI evidenceChristian C Ruff
University College London
J Cogn Neurosci 18:522-38. 2006..These findings indicate that specific components of preparatory visual attention may be devoted to minimizing the impact of distractors, not just to enhancements of target processing...
- Concurrent TMS-fMRI and psychophysics reveal frontal influences on human retinotopic visual cortexChristian C Ruff
UCL Institute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, United Kingdom
Curr Biol 16:1479-88. 2006....
- Hemispheric differences in frontal and parietal influences on human occipital cortex: direct confirmation with concurrent TMS-fMRIChristian 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...
- Distinct causal influences of parietal versus frontal areas on human visual cortex: evidence from concurrent TMS-fMRIChristian 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...
- Readout from iconic memory and selective spatial attention involve similar neural processesChristian C Ruff
Institute of Cognitive Neuroscience and Department of Psychology, University College London, London, United Kingdom
Psychol Sci 18:901-9. 2007..Some differences were also found; compared with precues, postcues led to higher activity in the right middle frontal gyrus...
- The role of contralesional dorsal premotor cortex after stroke as studied with concurrent TMS-fMRISven 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...
- Interhemispheric effect of parietal TMS on somatosensory response confirmed directly with concurrent TMS-fMRIFelix Blankenburg
Institute of Cognitive Neuroscience, University College London, London, United Kingdom
J Neurosci 28:13202-8. 2008....
- Concurrent TMS-fMRI reveals dynamic interhemispheric influences of the right parietal cortex during exogenously cued visuospatial attentionKlaartje Heinen
UCL Institute of Cognitive Neuroscience and Wellcome Trust Centre for Neuroimaging, University College London, 17 Queen Square, London WC1N 3AR, UK
Eur J Neurosci 33:991-1000. 2011....
- Influence of dopaminergically mediated reward on somatosensory decision-makingBurkhard Pleger
Wellcome Trust Centre for Neuroimaging at UCL, London, United Kingdom
PLoS Biol 7:e1000164. 2009..Prior to the procedure, participants received either placebo (saline), a dopamine agonist (levodopa), or an antagonist (haloperidol)...
- Top-down modulation of human early visual cortex after stimulus offset supports successful postcued reportClaire Sergent
University College London, UK
J Cogn Neurosci 23:1921-34. 2011..We suggest that, within this critical time window, sensory representation of a visual stimulus is still under construction and so can still be flexibly influenced by top-down modulatory processes...
- On-line attentional selection from competing stimuli in opposite visual fields: effects on human visual cortex and control processesJoy J Geng
UCL Institute of Cognitive Neuroscience, University College London, London, United Kingdom
J Neurophysiol 96:2601-12. 2006..Our results indicate that competition between visual stimuli in opposite hemifields can influence occipital cortex, and implicate IPS in resolution of this competition by selection...
- Saccades to a remembered location elicit spatially specific activation in human retinotopic visual cortexJoy J Geng
UCL Institute of Cognitive Neuroscience, UK
J Cogn Neurosci 21:230-45. 2009....
- Effects of parietal TMS on somatosensory judgments challenge interhemispheric rivalry accountsNeir Eshel
UCL Institute of Cognitive Neuroscience, University College London, London, UK
Neuropsychologia 48:3470-81. 2010..Our results argue against a strict rivalry interpretation, instead suggesting that parietal TMS can provide a pedestal-like increment in somatosensory response...
- New approaches to the study of human brain networks underlying spatial attention and related processesJon Driver
Wellcome Trust Centre for Neuroimaging and UCL Institute of Cognitive Neuroscience, University College London, 12 Queen Square, London, UK
Exp Brain Res 206:153-62. 2010..Such approaches shed new light on how frontal cortex and parietal cortex modulate sensory areas in the service of attention and cognition, for the normal and damaged human brain...
- Audiovisual synchrony enhances BOLD responses in a brain network including multisensory STS while also enhancing target-detection performance for both modalitiesJennifer L Marchant
Wellcome Trust Centre for Neuroimaging at UCL, Institute of Neurology, University College London, London, WC1N 3BG, United Kingdom
Hum Brain Mapp 33:1212-24. 2012..Predictability of temporal pattern did not affect target detection performance or STS activity, but did lead to an interaction with audiovisual synchrony for BOLD in inferior parietal cortex...
- Reward facilitates tactile judgments and modulates hemodynamic responses in human primary somatosensory cortexBurkhard Pleger
Wellcome Trust Centre for Neuroimaging, UCL, London WC1N 3AR, United Kingdom
J Neurosci 28:8161-8. 2008..These results indicate that rewards can influence not only classical reward-related regions, but also early somatosensory cortex when a decision is required for that modality...
- Integrated Bayesian models of learning and decision making for saccadic eye movementsKay H Brodersen
Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK
Neural Netw 21:1247-60. 2008....
- Dorsal premotor cortex exerts state-dependent causal influences on activity in contralateral primary motor and dorsal premotor cortexSven 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...
- Image artifacts in concurrent transcranial magnetic stimulation (TMS) and fMRI caused by leakage currents: modeling and compensationNikolaus Weiskopf
Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, University College London, London, United Kingdom
J Magn Reson Imaging 29:1211-7. 2009....
- Concurrent brain-stimulation and neuroimaging for studies of cognitionJon Driver
UCL Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, UK
Trends Cogn Sci 13:319-27. 2009..We illustrate this with examples from top-down modulation of visual cortex, response-competition, inter-hemispheric rivalry and motor tasks; but the new approach should be applicable to many domains of cognition...
- Mapping causal interregional influences with concurrent TMS-fMRISven 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...
- Spatial attention changes excitability of human visual cortex to direct stimulationSven Bestmann
Institute of Neurology, Wellcome Department of Imaging Neuroscience, University College London, London WC1N 3BG, United Kingdom
Curr Biol 17:134-9. 2007..Our results indicate that spatial attention can enhance visual-cortex excitability, and visual awareness, even when sensory signals from the eye via the thalamic pathway are bypassed...
- Parietal stimulation decouples spatial and feature-based attentionBertram Schenkluhn
Institute of Cognitive Neuroscience, University College London, London, United Kingdom
J Neurosci 28:11106-10. 2008..The selection of different stimulus characteristics is thus mediated by distinct top-down mechanisms, which can be decoupled by cortical interference...
- Cortical responses to changes in acoustic regularity are differentially modulated by attentional loadMaria Chait
Ear Institute, University College London, London, UK
Neuroimage 59:1932-41. 2012..In contrast, visual attentional-load had no effect on either transition response, consistent with the hypothesis that processing resources necessary for change detection are modality-specific...
- Repetitive transcranial magnetic stimulation-induced changes in sensorimotor coupling parallel improvements of somatosensation in humansBurkhard Pleger
Wellcome Department of Imaging Neuroscience, Institute of Neurology, London WC1N 3BG, United Kingdom
J Neurosci 26:1945-52. 2006..Thus, our data demonstrate that rTMS can temporarily induce behaviorally relevant reorganization within a complex cortical network underlying human somatosensory experience...
- Direct evidence for attention-dependent influences of the frontal eye-fields on feature-responsive visual cortexKlaartje Heinen
Institute of Cognitive Neuroscience Wellcome Trust Centre for Neuroimaging, University College London, London WC1N 3BG, UK
Cereb Cortex 24:2815-21. 2014..Our findings provide new causal evidence for the human FEF in the control of nonspatial "feature"-based attention, mediated by dynamic influences on feature-specific visual cortex that vary with the currently attended property. ..
- The cutaneous rabbit illusion affects human primary sensory cortex somatotopicallyFelix Blankenburg
UCL Institute of Cognitive Neuroscience, Department of Psychology, University College London, London, United Kingdom
PLoS Biol 4:e69. 2006..These results provide direct evidence that illusory somatosensory percepts can affect primary somatosensory cortex in a manner that corresponds somatotopically to the illusory percept...
- Short- and long-term changes in anterior cingulate activation during resolution of task-set competitionTodd S Woodward
Department of Research, Riverview Hospital, Coquitlam, Canada
Brain Res 1068:161-9. 2006....
- Reasoning, models, and images: behavioral measures and cortical activityMarkus Knauff
J Cogn Neurosci 15:559-73. 2003..All relations elicit mental models that underlie reasoning, but visual relations in addition elicit visual images. This account resolves inconsistencies in the previous literature...
- Methodological considerations regarding the association of Stroop and verbal fluency performance with the symptoms of schizophreniaTodd S Woodward
Department of Psychology, University of British Columbia, Vancouver, BC, Canada
Schizophr Res 61:207-14. 2003..It is suggested that assessing and reporting a full range of test parameters can reduce between-study inconsistencies. Cognitive interpretations for the present set of results are discussed...
- FMRI evidence for a three-stage model of deductive reasoningThomas Fangmeier
University of Freiburg
J Cogn Neurosci 18:320-34. 2006..Activity in these latter regions was specific to reasoning, as it was significantly decreased during matched working memory problems with identical premises and equal working memory load...
- Functional magnetic resonance imaging detects activation of the visual association cortex during laser acupuncture of the foot in humansChristian M Siedentopf
Department of Radiology II, University Hospital of Innsbruck, Innsbruck, Austria
Neurosci Lett 327:53-6. 2002..These results indicate that fMRI has the potential to elucidate effects of acupuncture on brain activity...