Operational principles of neurocognitive networks

Bressler, Steven L.; Tognoli, Emmanuelle

doi:10.1016/j.ijpsycho.2005.12.008

Cited by 233 publications

(189 citation statements)

References 127 publications

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“…From a functional perspective, the spatiotemporal brain organization is necessitated by evolutionary pressure [78]: In the space-constrained skull, more computational efficiency is obtained by grouping together (space aspect) neurons with similar function and denser interactions on a particular time scale (temporal aspect), so that the overall number of interconnections is minimized [79][80][81]. Indeed in the course of the evolution of the brain, the number of neurons has considerably increased, whereas their connections have become less direct [79,82,83], thus minimizing costs of interconnection between neural sites, and yielding efficient communication between them [84][85][86][87].…”

Section: Space and Time In The Brainmentioning

confidence: 99%

“…For the purpose of this review we will focus mostly on the cerebral cortex 17 as an essential component of brain-mind interaction [78]. The cerebral cortex (as well as the whole brain) operates 12 The MFT mathematically implements the main organizational features of a mind.…”

Section: Space and Time In The Brainmentioning

confidence: 99%

“…It is important to consider that the processes governing neural dynamics at any given scale are not only determined by the behavior of other neural structures at that scale, but also by the emergent behavior of smaller scales, and the constraining influence of activity at larger scales". For similar conceptualizations see also [3,6,25,30,78,93]. 19 A voltage impulse arriving at the neuron is classified as inhibitory if it tends to make the soma voltage more negative and therefore less likely to reach threshold, and excitatory if it raises the soma voltage towards (or above) threshold.…”

Section: Microscopic Level Of Brain Organizationmentioning

confidence: 99%

“…The cortical minicolumn is a likely candidate for the structural component of the single neuronal assembly [78]. It is an anatomically (spatially) distinct circuit of about one or two hundred neurons, oriented perpendicularly to the surface of the cortex (Fig.…”

Section: Spatial Structure Of Neuronal Assembliesmentioning

confidence: 99%

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Natural world physical, brain operational, and mind phenomenal space–time

Fingelkurts

Neves

2010

Physics of Life Reviews

166

233

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Concepts of space and time are widely developed in physics. However, there is a considerable lack of biologically plausible theoretical frameworks that can demonstrate how space and time dimensions are implemented in the activity of the most complex life-system -the brain with a mind. Brain activity is organized both temporally and spatially, thus representing space-time in the brain. Critical analysis of recent research on the space-time organization of the brain's activity pointed to the existence of so-called operational space-time in the brain. This space-time is limited to the execution of brain operations of differing complexity. During each such brain operation a particular short-term spatio-temporal pattern of integrated activity of different brain areas emerges within related operational space-time. At the same time, to have a fully functional human brain one needs to have a subjective mental experience. Current research on the subjective mental experience offers detailed analysis of space-time organization of the mind. According to this research, subjective mental experience (subjective virtual world) has definitive spatial and temporal properties similar to many physical phenomena. Based on systematic review of the propositions and tenets of brain and mind space-time descriptions, our aim in this review essay is to explore the relations between the two. To be precise, we would like to discuss the hypothesis that via the brain operational space-time the mind subjective space-time is connected to otherwise distant physical space-time reality.Key words: spatial, temporal, consciousness, cognition, operation, architectonics, EEG, field, metastability, physics, coordinative dynamics, self-organization, cortex.

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Section: Space and Time In The Brainmentioning

confidence: 99%

Section: Space and Time In The Brainmentioning

confidence: 99%

Section: Microscopic Level Of Brain Organizationmentioning

confidence: 99%

Section: Spatial Structure Of Neuronal Assembliesmentioning

confidence: 99%

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Natural world physical, brain operational, and mind phenomenal space–time

Fingelkurts

Neves

2010

Physics of Life Reviews

166

233

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“…Instead, fast and transient network fluctuations can be reflected by the inter-regional synchronization of neuroelectric signals with high time resolution Fries et al, 2001;Fries, 2005;Bressler and Tognoli, 2006;Bressler and Menon, 2010). Therefore, the spatial phase synchronization of event-related EEG oscillations was analyzed, to assess fast dynamic interactions of frontal and parietal regions.…”

Section: Introductionmentioning

confidence: 99%

Synchronization of fronto-parietal beta and theta networks as a signature of visual awareness in neglect

et al. 2017

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The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. In the neglect syndrome, the perceptual deficit for contra-lesional hemi-space is increasingly viewed as a dysfunction of fronto-parietal cortical networks, the disruption of which has been described in neuroanatomical and hemodynamic studies. Here we exploit the superior temporal resolution of electroencephalography (EEG) to study dynamic transient connectivity of fronto-parietal circuits at early stages of visual perception in neglect. As reflected by interregional phase synchronization in a full-field attention task, two functionally distinct frontoparietal networks, in beta (15-25 Hz) and theta (4-8 Hz) frequency bands, were related to stimulus discrimination within the first 200 ms of visual processing. Neglect pathology was specifically associated with significant suppressions of both beta and theta networks engaging right parietal regions. These connectivity abnormalities occurred in a pattern that was distinctly different from what was observed in right-hemisphere lesion patients without neglect. Also, both beta and theta abnormalities contributed additively to visual awareness decrease, quantified in the Behavioural Inattention Test. These results provide evidence for the impairment of fast dynamic fronto-parietal interactions during early stages of visual processing in neglect pathology. Also, they reveal that different modes of fronto-parietal dysfunction contribute independently to deficits in visual awareness at the behavioural level.

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Critical Slowing and Perception

Friston

Breakspear

Deco

2014

Criticality in Neural Systems

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It is generally assumed that criticality and metastability underwrite the brain's dynamic repertoire of responses to an inconstant world. From perception to behavior, the ability to respond sensitively to changes in the environment -and to explore alternative hypotheses and policies -seems inherently linked to selforganized criticality. This chapter addresses the relationship between perception and criticality -using recent advances in the theoretical neuroscience of perceptual inference. In short, we will see that (Bayes) optimal inference -on the causes of sensations -necessarily entails a form of criticality -critical slowing -and a balanced synchronization between the sensorium and neuronal dynamics. This means that the optimality principles describing our exchanges with the world may also account for dynamical phenomena that characterize self-organized systems such as the brain.This chapter considers the formal basis of self-organized instabilities that enable perceptual transitions during Bayes-optimal perception. We will consider the perceptual transitions that lead to conscious ignition [1] and how they depend on dynamical instabilities that underlie chaotic itinerancy [2, 3] and self-organized criticality [4][5][6]. We will try to understand these transitions using a dynamical formulation of perception as approximate Bayesian inference. This formulation suggests that perception has an inherent tendency to induce dynamical instabilities that enable the brain to respond sensitively to sensory perturbations. We review the dynamics of perception, in terms of Bayesian optimization (filtering), present a formal conjecture about self-organized instability, and then test this conjecture, using neuronal simulations of perceptual categorization. Perception and Neuronal DynamicsPerceptual categorization speaks to two key dynamical phenomena: transitions from one perceptual state to another and the dynamical mechanisms that permit Criticality in Neural Systems, First Edition. Edited by Dietmar Plenz and Ernst Niebur.

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Operational principles of neurocognitive networks

Cited by 233 publications

References 127 publications

Natural world physical, brain operational, and mind phenomenal space–time

Natural world physical, brain operational, and mind phenomenal space–time

Synchronization of fronto-parietal beta and theta networks as a signature of visual awareness in neglect

Critical Slowing and Perception

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