http://popups.lib.uliege.be/1373-5411/index.php?id=4425 Publications of Auteurs José Barahona da Fonseca fr 0 http://popups.lib.uliege.be/1373-5411/index.php?id=3052 In this work we consider phenomena or multisensory convergence as leading to a process of representation which possesses a higher degree of abstraction than it would result from a representation by multiple specific sensory processes considered as a heterogeneous ensemble. It can be immediately noticed some analogy with other systems of the brain, namely with reticular ascending activating system which is formed by networks of cells and their connections, each one responding to multiple sensory heterogeneous efferents. Nevertheless there are some remarkable differences between the two types of multisensory convergence namely the level of representation of associative multisensory systems is more elaborate, more precise and implies a higher level of differentiated abstraction than it is the case with cells of the reticular system witch serve only functions of arousal of the brain or control of the sleep-wakefulness system or attention. We show that the processing of EEG and ERPs signals by the Lee detection method and then by Fourier analysis can be used to identify high abstraction level cognitive processes and emotional states. Finally we present some examples of application of Lee method to ERP and EEG records. Fri, 06 Sep 2024 16:04:55 +0200 Thu, 10 Oct 2024 10:27:42 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=3052 http://popups.lib.uliege.be/1373-5411/index.php?id=2494 A model of dendritic computation based on active zones is first described and is used in a Quantum Chemisty model for purely cognitive or else cognitive-affective or cognitive-motor psychophysiological processes Fri, 23 Aug 2024 16:21:47 +0200 Thu, 10 Oct 2024 16:35:31 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2494 http://popups.lib.uliege.be/1373-5411/index.php?id=2490 We first consider the information flow and processing that is involved in perception considering the requirements necessary to explain the passage of elementary mappings to object representation and cognitive characterization of representations. The relationships between procedural implicit cognitive processes, and on the other hand, linguistic declarative processes is discussed. A reference to Marcus's results is made, taking into account experimental data and theoretical proposals, involving concepts of Quantum Chemistry made by our group. Fri, 23 Aug 2024 16:01:17 +0200 Thu, 10 Oct 2024 10:23:12 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2490 http://popups.lib.uliege.be/1373-5411/index.php?id=2325 Aiming the delineation of a model for the interactions between organisms and environment the sensory motor transformations that occur in Posterior Parietal Cortex structures are used as a possible explanation for the contextualization of body representations in movement planning, command and execution. This is extended to the meaning construction in social interactions. A bidirectional model is proposed using script paradigm in which to each participant is attributed complementary generative functions and transformation operators of action/reaction. The interaction has a trajectory that unfolds in time of successive stages in which the criteria depend not only on the present conditions but also from future anticipated states which adds temporal and intentional dimensions to the model. The distance within this space of qualities determines the intensity and valence of emotions. Thu, 01 Aug 2024 13:51:22 +0200 Thu, 10 Oct 2024 10:27:04 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2325 http://popups.lib.uliege.be/1373-5411/index.php?id=2304 The Rosetta Stone, is used as a metaphor about the Central Nervous System functioning. In CNS, messages are simultaneously expressed in a linguistic form, in commands or behaviours, and in neurophysiologic processes and decisions. The meaning and intention of states expressed in a linguistic form engage anticipatory and consummatory references, intentional declarative processes and neurophysiologic decisions. From a systemic viewpoint, the meaning and intention of a concept can be formulated taking into account respectively state transition matrices which, given a certain state and an input specify respectively the next state of a system and its output. The meaning and intention of a concept are specified by a set of decision rules which allow its inclusion in the class of equivalence that specifies the concept in extension. Wed, 31 Jul 2024 13:05:57 +0200 Thu, 10 Oct 2024 16:23:02 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2304 http://popups.lib.uliege.be/1373-5411/index.php?id=2201 We found the magic square a simple problem with a very rich combinatorics : for a magic square of order n, there are n²! manners to fill tbe nxn matrix with integers between 1 and n2, without repetitions, but only very few of them are magic squares (Ball, 1963). For order 4 there are exactly 7040 magic squares. So we use the magic square as a benchmark to compare mathematical programming, namely mixed integer programming (MIP), with Genetic Algorithms (GAs), that we will show are much more powerful to solve these kind of discrete combinatorial explosive problems. Finally we developed an artificial intelligence randomized minimax algorithm that imitates a human solving the magic square and we showed that in most cases its performance, in terms of number of changes of pairs of numbers, is better than the performance of the GA algorithm. Tue, 30 Jul 2024 13:29:21 +0200 Thu, 10 Oct 2024 10:28:12 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=2201 http://popups.lib.uliege.be/1373-5411/index.php?id=1282 The integration between psychological concepts and neurophysiological data pose many epistemic difficulties which create almost unsolvable problems. We used the strategy of reconsidering experimental data and theoretical concepts within the frame of reference of some concepts from Quantum Physics and Chemistry. The model of a particle in a box against a potential barrier proved to be adequate to describe and interpret behavioural data from a neurophysiological viewpoint. Concerning cognitive processes we used the model of atom orbitals and of isolobal fragments to build a model of information processing in the frequency domain. After examining some problems related to anticipation, hypothesis construction and transformation we tested experimentally some of these ideas. Analysis of EEG records using Lee method of cross-correlation with Dirac delta waves repeated periodically yields distinctive spatial distributions of patterns of periodic waveforms for cognitive-affective states- joy, sadness, anxiety, anger and mistrust. It was possible, using exclusively electrophysiological indicators in the frequency domain, to classify adequately a group of 35 subjects that experienced these five cognitive-affective states. Wed, 10 Jul 2024 10:30:11 +0200 Thu, 10 Oct 2024 10:21:33 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=1282 http://popups.lib.uliege.be/1373-5411/index.php?id=978 After briefly reviewing cunent psychological and neurophysiological knowledge about cognitive processes it is presented a chemical reaction paradigm which allows quantitative analysis of their dynamics. It is also made a reinterpretation of the model in terms of dendrodendritic local computations as well as of somato-axonal communication at a distance. It is suggested the possible utility of this model for the understanding of psychopharmacological therapy of mental disorders. Wed, 03 Jul 2024 15:59:30 +0200 Thu, 10 Oct 2024 10:26:33 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=978