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Cognitive neurodynamics

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https://www.readbyqxmd.com/read/29097049/the-absence-of-resting-state-high-gamma-cross-frequency-coupling-in-patients-with-tinnitus
#1
Min-Hee Ahn, Sung Kwang Hong, Byoung-Kyong Min
Tinnitus is a psychoacoustic phantom perception of currently unknown neuropathology. Despite a growing number of post-stimulus tinnitus studies, uncertainty still exists regarding the neural signature of tinnitus in the resting-state brain. In the present study, we used high-gamma cross-frequency coupling and a Granger causality analysis to evaluate resting-state electroencephalographic (EEG) data in healthy participants and patients with tinnitus. Patients with tinnitus lacked robust frontal delta-phase/central high-gamma-amplitude coupling that was otherwise clearly observed in healthy participants...
October 30, 2017: Hearing Research
https://www.readbyqxmd.com/read/29081593/neurodynamic-correlates-of-response-inhibition-from-emerging-to-mid-adulthood
#2
Martina Knežević, Ksenija Marinković
Response inhibition, a key executive function, continues to develop in early adulthood in parallel with maturational processes of the underlying prefrontal regions known to support it. The current study examined behavioral and neurophysiological correlates of response inhibition during a visual Go/No-Go task in a large sample (N = 120) comprised of participants in their Early 20s (ages 19-21), Mid 20s (ages 23-27), and Early 30s (ages 28-42). The two younger groups had lower accuracy, shorter reaction times, and made more premature responses compared to Early 30s...
July 2017: Cognitive Development
https://www.readbyqxmd.com/read/28923161/comparing-the-cognitive-process-of-circular-causality-in-two-patients-with-strokes-through-qualitative-analysis
#3
Seyed Alireza Derakhshanrad, Emily Piven, Bahareh Zeynalzadeh Ghoochani
Walter J. Freeman pioneered the neurodynamic model of brain activity when he described the brain dynamics for cognitive information transfer as the process of circular causality at intention, meaning, and perception (IMP) levels. This view contributed substantially to establishment of the Intention, Meaning, and Perception Model of Neuro-occupation in occupational therapy. As described by the model, IMP levels are three components of the brain dynamics system, with nonlinear connections that enable cognitive function to be processed in a circular causality fashion, known as Cognitive Process of Circular Causality (CPCC)...
October 2017: Nonlinear Dynamics, Psychology, and Life Sciences
https://www.readbyqxmd.com/read/28923160/applying-the-neurodynamics-of-emotional-circular-causalities-in-psychosocial-and-cognitive-therapy-using-multi-sensory-environments-an-orbde-case-study-analysis
#4
Janice Ryan
This exploratory, evidence-based practice research study focuses on presenting a plausible mesoscopic brain dynamics hypothesis for the benefits of treating clients with psychosocial and cognitive challenges using a mindful therapeutic approach and multi-sensory environments. After an extensive neuroscientific review of the therapeutic benefits of mindfulness, a multi-sensory environment is presented as a window of therapeutic opportunity to more quickly and efficiently facilitate the neurobiological experience of becoming more mindful or conscious of self and environment...
October 2017: Nonlinear Dynamics, Psychology, and Life Sciences
https://www.readbyqxmd.com/read/28512438/are-neurodynamic-organizations-a-fundamental-property-of-teamwork
#5
Ronald H Stevens, Trysha L Galloway
When performing a task it is important for teams to optimize their strategies and actions to maximize value and avoid the cost of surprise. The decisions teams make sometimes have unintended consequences and they must then reorganize their thinking, roles and/or configuration into corrective structures more appropriate for the situation. In this study we ask: What are the neurodynamic properties of these reorganizations and how do they relate to the moment-by-moment, and longer, performance-outcomes of teams?...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28405191/cognitive-architecture-with-evolutionary-dynamics-solves-insight-problem
#6
Anna Fedor, István Zachar, András Szilágyi, Michael Öllinger, Harold P de Vladar, Eörs Szathmáry
In this paper, we show that a neurally implemented a cognitive architecture with evolutionary dynamics can solve the four-tree problem. Our model, called Darwinian Neurodynamics, assumes that the unconscious mechanism of problem solving during insight tasks is a Darwinian process. It is based on the evolution of patterns that represent candidate solutions to a problem, and are stored and reproduced by a population of attractor networks. In our first experiment, we used human data as a benchmark and showed that the model behaves comparably to humans: it shows an improvement in performance if it is pretrained and primed appropriately, just like human participants in Kershaw et al...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28217092/neurodynamics-in-the-sensorimotor-loop-representing-behavior-relevant-external-situations
#7
Frank Pasemann
In the context of the dynamical system approach to cognition and supposing that brains or brain-like systems controlling the behavior of autonomous systems are permanently driven by their sensor signals, the paper approaches the question of neurodynamics in the sensorimotor loop in a purely formal way. This is carefully done by addressing the problem in three steps, using the time-discrete dynamics of standard neural networks and a fiber space representation for better clearness. Furthermore, concepts like meta-transients, parametric stability and dynamical forms are introduced, where meta-transients describe the effect of realistic sensor inputs, parametric stability refers to a class of sensor inputs all generating the "same type" of dynamic behavior, and a dynamical form comprises the corresponding class of parametrized dynamical systems...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28174612/classification-of-epileptic-seizures-using-wavelet-packet-log-energy-and-norm-entropies-with-recurrent-elman-neural-network-classifier
#8
S Raghu, N Sriraam, G Pradeep Kumar
Electroencephalogram shortly termed as EEG is considered as the fundamental segment for the assessment of the neural activities in the brain. In cognitive neuroscience domain, EEG-based assessment method is found to be superior due to its non-invasive ability to detect deep brain structure while exhibiting superior spatial resolutions. Especially for studying the neurodynamic behavior of epileptic seizures, EEG recordings reflect the neuronal activity of the brain and thus provide required clinical diagnostic information for the neurologist...
February 2017: Cognitive Neurodynamics
https://www.readbyqxmd.com/read/27982418/a-developmental-neuroscience-study-of-moral-decision-making-regarding-resource-allocation
#9
Kimberly L Meidenbauer, Jason M Cowell, Melanie Killen, Jean Decety
Distinguishing between equity and equality is essential when making social and moral decisions, yet the related neurodevelopmental processes are unknown. Evaluations of contextually based third-party distributions incorporating recipient need and resource importance were examined in children and adolescents (N = 82; 8-16 years). Spatiotemporal neurodynamic responses show distinct developmental profiles to viewing such distributions. Event-related potentials (ERPs) differentially predicted real-life behaviors based on age, where older children's (8-10 years) evaluations were related to a fairly rapid, automatic ERP component (early posterior negativity), whereas adolescent and preadolescent (11-16 years) evaluations, first-person allocations, and prosocial behaviors were predicted by later, cognitively controlled ERP components (P3 and late positive potential)...
December 16, 2016: Child Development
https://www.readbyqxmd.com/read/27891195/reflections-on-a-giant-of-brain-science-how-lucky-we-are-having-walter-j-freeman-as-our-beacon-in-cognitive-neurodynamics-research
#10
REVIEW
Robert Kozma
Walter J. Freeman was a giant of the field of neuroscience whose visionary work contributed various experimental and theoretical breakthroughs to brain research in the past 60 years. He has pioneered a number of Electroencephalogram and Electrocorticogram tools and approaches that shaped the field, while "Freeman Neurodynamics" is a theoretical concept that is widely known, used, and respected among neuroscientists all over the world. His recent death is a profound loss to neuroscience and biomedical engineering...
December 2016: Cognitive Neurodynamics
https://www.readbyqxmd.com/read/27814463/mittag-leffler-stability-of-fractional-order-neural-networks-in-the-presence-of-generalized-piecewise-constant-arguments
#11
Ailong Wu, Ling Liu, Tingwen Huang, Zhigang Zeng
Neurodynamic system is an emerging research field. To understand the essential motivational representations of neural activity, neurodynamics is an important question in cognitive system research. This paper is to investigate Mittag-Leffler stability of a class of fractional-order neural networks in the presence of generalized piecewise constant arguments. To identify neural types of computational principles in mathematical and computational analysis, the existence and uniqueness of the solution of neurodynamic system is the first prerequisite...
January 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/27725178/top-down-and-bottom-up-neurodynamic-evidence-in-patients-with-tinnitus
#12
Sung Kwang Hong, Sejik Park, Min-Hee Ahn, Byoung-Kyong Min
Although a peripheral auditory (bottom-up) deficit is an essential prerequisite for the generation of tinnitus, central cognitive (top-down) impairment has also been shown to be an inherent neuropathological mechanism. Using an auditory oddball paradigm (for top-down analyses) and a passive listening paradigm (for bottom-up analyses) while recording electroencephalograms (EEGs), we investigated whether top-down or bottom-up components were more critical in the neuropathology of tinnitus, independent of peripheral hearing loss...
December 2016: Hearing Research
https://www.readbyqxmd.com/read/27515220/cycles-of-insanity-and-creativity-within-contemplative-neural-systems
#13
Stephen L Thaler
Random connection weight disturbances within an assembly of artificial neural networks (ANN) drive a progression of activation patterns that are tantamount to the memories and ideas nucleating within the brain's cortex. The numerical evaluation of these pattern-based notions by another, more placid system of ANNs governs the magnitude of weight disturbances administered to the former assembly, that perturbative intensity in turn controlling the novelty of the resulting ideational stream as well as the retention of newly formed concepts...
September 2016: Medical Hypotheses
https://www.readbyqxmd.com/read/27240179/-post-stroke-cognitive-impairment-and-the-possibility-of-treatment-with-cellex
#14
A A Kulesh, V V Shestakov
OBJECTIVE: To present neuropsychological characteristics of post-stroke cognitive impairment (PSCI) in acute ischemic stroke (IS) and to assess the efficacy of the drug cellex. MATERIAL AND METHODS: A comprehensive neuropsychological testing battery was administered to 288 patients with acute IS. In addition to basic therapy, 30 patients received cellexin the dosage of 0.1 mg (1 ml) subcutaneously for 10 days, treatment was started in the acute phase. RESULTS AND CONCLUSION: Multifunctional PSCI were revealed in 87% of patients with acute IS...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27192841/-neurodynamic-bases-of-imitation-learning-and-episodic-memory
#15
REVIEW
V D Tsukerman
In this review, three essentially important processes in development of cognitive behavior are considered: knowledge of a spatial environment by means of physical activity, coding and a call of an existential context of episodic memory and imitation learning based on the mirror neural mechanism. The data show that the parietal and frontal system of learning by imitation, allows the developing organism to seize skills of management and motive synergies in perisomatic space, to understand intentions and the purposes of observed actions of other individuals...
March 2016: Biofizika
https://www.readbyqxmd.com/read/27173759/frontal-preparatory-neural-oscillations-associated-with-cognitive-control-a-developmental-study-comparing-young-adults-and-adolescents
#16
Kai Hwang, Avniel S Ghuman, Dara S Manoach, Stephanie R Jones, Beatriz Luna
Functional magnetic resonance imaging (fMRI) studies suggest that age-related changes in the frontal cortex may underlie developmental improvements in cognitive control. In the present study we used magnetoencephalography (MEG) to identify frontal oscillatory neurodynamics that support age-related improvements in cognitive control during adolescence. We characterized the differences in neural oscillations in adolescents and adults during the preparation to suppress a prepotent saccade (antisaccade trials-AS) compared to preparing to generate a more automatic saccade (prosaccade trials-PS)...
August 1, 2016: NeuroImage
https://www.readbyqxmd.com/read/26601412/-the-effect-of-audiovisual-stimulation-on-psychological-and-physiological-functions-in-athletes
#17
COMPARATIVE STUDY
M S Golovin, N V Balioz, R I Aizman, S G Krivoschekov
We studied the psychophysiological status (cognitive, psychoemotional and neurodynamic parameters), the power spectrum of EEG and heart rate variability of 18-23-year-old athletes, before and after a course of audiovisual stimulation (AVS) (experimental group) in comparison with sportsmen who did not receive AVS (control group). It was shown that a course of AVS (experimental group) has positive effect on psycho-emotional parameters (the levels of anxiety and neuroticism decreased; motivation to make progress and the level of hardiness increased), cognitive and neurodynamic parameters (the capacity of mechanical memory, the speed of attention switching and of a simple sensor-motor response increase; the range of fluctuation of reactions to a moving object is reduced)...
September 2015: Fiziologiia Cheloveka
https://www.readbyqxmd.com/read/26554845/neural-mechanisms-of-hypnosis-and-meditation
#18
REVIEW
Giuseppe De Benedittis
Hypnosis has been an elusive concept for science for a long time. However, the explosive advances in neuroscience in the last few decades have provided a "bridge of understanding" between classical neurophysiological studies and psychophysiological studies. These studies have shed new light on the neural basis of the hypnotic experience. Furthermore, an ambitious new area of research is focusing on mapping the core processes of psychotherapy and the neurobiology/underlying them. Hypnosis research offers powerful techniques to isolate psychological processes in ways that allow their neural bases to be mapped...
December 2015: Journal of Physiology, Paris
https://www.readbyqxmd.com/read/26184761/a-cortical-network-model-of-cognitive-and-emotional-influences-in-human-decision-making
#19
Azadeh Hassannejad Nazir, Hans Liljenström
Decision making (DM)(2) is a complex process that appears to involve several brain structures. In particular, amygdala, orbitofrontal cortex (OFC) and lateral prefrontal cortex (LPFC) seem to be essential in human decision making, where both emotional and cognitive aspects are taken into account. In this paper, we present a computational network model representing the neural information processing of DM, from perception to behavior. We model the population dynamics of the three neural structures (amygdala, OFC and LPFC), as well as their interaction...
October 2015: Bio Systems
https://www.readbyqxmd.com/read/26180194/amphetamine-exerts-dose-dependent-changes-in-prefrontal-cortex-attractor-dynamics-during-working-memory
#20
Christopher C Lapish, Emili Balaguer-Ballester, Jeremy K Seamans, Anthony G Phillips, Daniel Durstewitz
Modulation of neural activity by monoamine neurotransmitters is thought to play an essential role in shaping computational neurodynamics in the neocortex, especially in prefrontal regions. Computational theories propose that monoamines may exert bidirectional (concentration-dependent) effects on cognition by altering prefrontal cortical attractor dynamics according to an inverted U-shaped function. To date, this hypothesis has not been addressed directly, in part because of the absence of appropriate statistical methods required to assess attractor-like behavior in vivo...
July 15, 2015: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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