DMN operational synchrony relates to self-consciousness: Evidence from patients in vegetative and minimally conscious states
David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
Learn more about PhilPapers
Andrew A. Fingelkurts, Alexander A. Fingelkurts, Sergio Bagnato, Cristina Boccagni & Giuseppe Galardi
Open Neuroimaging Journal 6:55-68 (2012)
The default mode network (DMN) has been consistently activated across a wide variety of self-related tasks, leading to a proposal of the DMN’s role in self-related processing. Indeed, there is limited fMRI evidence that the functional connectivity within the DMN may underlie a phenomenon referred to as self-awareness. At the same time, none of the known studies have explicitly investigated neuronal functional interactions among brain areas that comprise the DMN as a function of self-consciousness loss. To fill this gap, EEG operational synchrony analysis was performed in patients with severe brain injuries in vegetative and minimally conscious states to study the strength of DMN operational synchrony as a function of self-consciousness expression. We demonstrated that the strength of DMN EEG operational synchrony was smallest or even absent in patients in vegetative state, intermediate in patients in minimally conscious state and highest in healthy fully self-conscious subjects. At the same time the process of decoupling of operations performed by neuronal assemblies that comprise the DMN was highest in patients in vegetative state, intermediate in patients in minimally conscious state and minimal in healthy fully self-conscious subjects. The DMN’s frontal EEG operational module had the strongest decrease in operational synchrony strength as a function of selfconsciousness loss, when compared with the DMN’s posterior modules. Based on these results it is suggested that the strength of DMN functional connectivity could mediate the strength of self-consciousness expression. The observed alterations similarly occurred across EEG alpha, beta1 and beta2 frequency oscillations. Presented results suggest that the EEG operational synchrony within DMN may provide an objective and accurate measure for the assessment of signs of self-(un)consciousness in these challenging patient populations. This method therefore, may complement the current diagnostic procedures for patients with severe brain injuries and, hence, the planning of a rational rehabilitation intervention.
|Keywords||EEG alpha and beta rhythms brain operations resting state default mode network DMN synchronization functional connectivity (un)consciousness of self VS MCS disorders of consciousness|
|Categories||categorize this paper)|
Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
|Through your library|
References found in this work BETA
No references found.
Citations of this work BETA
No citations found.
Similar books and articles
Andrew A. Fingelkurts, Alexander A. Fingelkurts, Sergio Bagnato, Cristina Boccagni & Giuseppe Galardi (2012). Toward Operational Architectonics of Consciousness: Basic Evidence From Patients with Severe Cerebral Injuries. Cognitive Processing 13 (2):111-131.
Andrew A. Fingelkurts & Alexander A. Fingelkurts (2011). Persistent Operational Synchrony Within Brain Default-Mode Network and Self-Processing Operations in Healthy Subjects. Brain and Cognition 75 (2):79-90.
Christophe Phillips & Rafael Malach, Identifying the Default-Mode Component in Spatial IC Analyses of Patients with Disorders of Consciousness.
Alexander A. Fingelkurts, Andrew A. Fingelkurts, Sergio Bagnato, Cristina Boccagni & Giuseppe Galardi (2013). The Value of Spontaneous EEG Oscillations in Distinguishing Patients in Vegetative and Minimally Conscious States. In Eror Basar & et all (eds.), Application of Brain Oscillations in Neuropsychiatric Diseases. Supplements to Clinical Neurophysiology. Elsevier. 81-99.
Andrew A. Fingelkurts, Alexander A. Fingelkurts, Sergio Bagnato, Cristina Boccagni & Giuseppe Galardi (2013). Prognostic Value of Resting-State EEG Structure in Disentangling Vegetative and Minimally Conscious States: A Preliminary Study. Neurorehabilitation and Neural Repair 27 (4):345-354.
Alexander A. Fingelkurts, Andrew A. Fingelkurts, Sergio Bagnato, Cristina Boccagni & Giuseppe Galardi (2012). EEG Oscillatory States as Neuro-Phenomenology of Consciousness as Revealed From Patients in Vegetative and Minimally Conscious States. Consciousness and Cognition 21 (1):149-169.
Andrew A. Fingelkurts, Alexander A. Fingelkurts & Carlos F. H. Neves (2009). Brain and Mind Operational Architectonics and Man-Made “Machine” Consciousness. Cognitive Processing 10 (2):105-111.
Nicholas Shea & Tim Bayne (2010). The Vegetative State and the Science of Consciousness. British Journal for the Philosophy of Science 61 (3):459.
Andrew A. Fingelkurts, Alexander A. Fingelkurts, Sakari Kallio & Antti Revonsuo (2007). Cortex Functional Connectivity as a Neurophysiological Correlate of Hypnosis: An EEG Case Study. Neuropsychologia 45 (7):14521462.
Jukka Varelius (2009). Minimally Conscious State and Human Dignity. Neuroethics 2 (1):35-50.
Quentin Noirhomme & Caroline Schnakers, A Twitch of Consciousness: Defining the Boundaries of Vegetative and Minimally Conscious States.
Jakob Hohwy & David Reutens (2009). A Case for Increased Caution in End of Life Decisions for Disorders of Consciousness. Monash Bioethics 28 (2):13.1-13.13.
Guy Kahane & Julian Savulescu (2009). Brain-Damaged Patients and the Moral Significance of Consciousness. Journal of Medicine and Philosophy 34 (1):6-26.
Neil Levy & Julian Savulescu (2009). Moral Significance of Phenomenal Consciousness. Progress in Brain Research.
Added to index2012-08-03
Total downloads19 ( #89,007 of 1,101,576 )
Recent downloads (6 months)2 ( #178,496 of 1,101,576 )
How can I increase my downloads?