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Introduction the Cognitive Neuroscience of Consciousness This article was downloaded by: [Consorci de Biblioteques Universitaries de Catalunya] On: 3 September 2010 Access details: Access Details: [subscription number 907788032] Publisher Psychology Press Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37- 41 Mortimer Street, London W1T 3JH, UK Cognitive Neuroscience Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t909559412 The cognitive neuroscience of consciousness Geraint Reesa; Anil K. Sethb a University College London, London, UK b University of Sussex, Brighton, UK Online publication date: 25 August 2010 To cite this Article Rees, Geraint and Seth, Anil K.(2010) 'The cognitive neuroscience of consciousness', Cognitive Neuroscience, 1: 3, 153 — 154 To link to this Article: DOI: 10.1080/17588928.2010.503602 URL: http://dx.doi.org/10.1080/17588928.2010.503602 PLEASE SCROLL DOWN FOR ARTICLE Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, re-distribution, re-selling, loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material. COGNITIVE NEUROSCIENCE, 2010, 1 (3), 153–154 PCNS Introduction The cognitive neuroscience of consciousness Cognitive neuroscience of consciousness Geraint Rees1 and Anil K. Seth2 1University College London, London, UK 2University of Sussex, Brighton, UK The past decade has seen an explosion of interest in the neural mechanisms underlying consciousness. Experimental approaches from cognitive neuroscience that emphasize converging evidence from multiple methodologies have changed our understanding of how conscious mental states are associated with patterns of brain activity. In this special issue of Cognitive Neuroscience, we bring together five new empirical contributions to this literature plus a new theoretical discussion paper and associated peer commentaries. To understand the relationship between conscious cognition and consciousness. Bruno and colleagues mental states and brain activity, we must make review the relevant work, and present new data col- progress in three distinct areas. To be conscious is to lected in the resting state that may prove helpful in be awake (rather than in a dreamless sleep, or uncon- diagnostic and prognostic classification. scious) and so we must understand the neural mecha- The level of consciousness does not only change nisms associated with changes in level of following brain injury, but follows a natural pattern in consciousness. But when we are awake, our conscious healthy animals of sleep/wake cycles. Massimini and states are individuated by their content, which has a colleagues (this issue) focus on the consequences of particular subjective feel. We therefore need to under- such cycles for cortical processing, using transcranial stand the neural underpinnings of conscious content, magnetic stimulation in combination with high-density and how such representations in the brain are distin- EEG to show striking changes in cortical reactivity guished from merely unconscious processing. And and effective connectivity during rapid eye movement finally humans (and possibly some other animals) are (REM) sleep compared to non-REM sleep; notably, self-aware and able to make introspective judgments the changes observed in REM sleep are similar to about their perception and action. Understanding the those observed in wakefulness. These findings sug- neural correlates of such metacognitive ability is also gest that measuring cortical reactivity and effective Downloaded By: [Consorci de Biblioteques Universitaries Catalunya] At: 09:44 3 September 2010 required. connectivity may help evaluate whether an individual In this special issue, exciting new empirical data is capable of having conscious experiences, and so are presented in each of these areas. Bruno et al. (this have wider application in brain injured patients. issue) focus on the challenging problem of assessing Brain injury can also cause selective impairment to patients in a minimally conscious or persistent vegetative the contents of consciousness. Spatial neglect com- state. These disorders are difficult to characterize clin- monly follows right parietal injury and results in diffi- ically and there has been much recent interest in using culty noticing or responding to objects in the functional neuroimaging to investigate possible residual contralateral visual field. In this issue, Eramudugolla, Correspondence should be addressed to: Geraint Rees, UCL Institute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK. E-mail: [email protected] © 2010 Psychology Press, an imprint of the Taylor & Francis Group, an Informa business www.psypress.com/cognitiveneuroscience DOI: 10.1080/17588928.2010.503602 154 REES AND SETH Mattingley, and Driver report a single case where neural activity, contrasting this position with the awareness of contralateral stimuli critically depends notion that consciousness is associated with activity in on biases in figure–ground segregation induced by an extended fronto-parietal network. Critically, Lamme changing the relative salience of figure and ground. argues that consideration of recurrent processing as a Two studies explicitly examine self-awareness, but fundamental explanation for phenomenality allows us from different perspectives. Menzer and colleagues to take seriously the notion advanced by philosophers (this issue) focus on the sense of agency that we such as Ned Block (e.g., Block, 2005) that we can experience in linking the sound of our footsteps to our have phenomenal states that are unreportable. On own actions. By manipulating the delay between Lamme’s account, phenomenality arises through recur- walking and hearing the sound of footsteps, they rent processing, while it is reportability that requires examine the temporal dependency of this sense of involvement of a frontoparietal network. self-agency. In contrast, Rounis, Maniscalco, Rothwell, Taken together, the work reported in this themed Passingham, and Lau (this issue) examine how issue of Cognitive Neuroscience demonstrates the humans make introspective (metacognitive) judg- empirical vigour and ingenuity that characterize this ments about their accuracy in a simple visual discrim- field, together with the increasing theoretical sophisti- ination task. Transcranial magnetic stimulation over cation and debate surrounding elaborated theories of dorsolateral prefrontal cortex impairs such metacog- visual awareness. Such interaction between theoretical nition while leaving actual discrimination unaffected, debate and empirical work is testimony to the rapidly indicating a role for this structure in making metacog- growing maturity of this work on the cognitive neuro- nitive judgements. science of consciousness. All empirical work ultimately requires a theoretical framework, and in this special issue Victor Lamme provides a thoughtful and provocative discussion REFERENCE paper attracting vigorous peer commentary. Lamme presents an extended argument that the phenomenal- Block, N. (2005). Two neural correlates of consciousness. ity of conscious experience is explained by recurrent Trends in Cognitive Sciences, 9, 46–52. Downloaded By: [Consorci de Biblioteques Universitaries Catalunya] At: 09:44 3 September 2010.
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