scholarly journals How Morphological Computation Shapes Integrated Information in Embodied Agents

2021 ◽  
Vol 12 ◽  
Author(s):  
Carlotta Langer ◽  
Nihat Ay
Keyword(s):  
Information Integration ◽  
The Body ◽  
Information Flows ◽  
Morphological Computation ◽  
The One ◽  
Goal Directed Behavior ◽  
The Brain ◽  
Integrated Information Theory ◽  
Embodied Agent ◽  
Integrated Information

The Integrated Information Theory provides a quantitative approach to consciousness and can be applied to neural networks. An embodied agent controlled by such a network influences and is being influenced by its environment. This involves, on the one hand, morphological computation within goal directed action and, on the other hand, integrated information within the controller, the agent's brain. In this article, we combine different methods in order to examine the information flows among and within the body, the brain and the environment of an agent. This allows us to relate various information flows to each other. We test this framework in a simple experimental setup. There, we calculate the optimal policy for goal-directed behavior based on the “planning as inference” method, in which the information-geometric em-algorithm is used to optimize the likelihood of the goal. Morphological computation and integrated information are then calculated with respect to the optimal policies. Comparing the dynamics of these measures under changing morphological circumstances highlights the antagonistic relationship between these two concepts. The more morphological computation is involved, the less information integration within the brain is required. In order to determine the influence of the brain on the behavior of the agent it is necessary to additionally measure the information flow to and from the brain.

scholarly journals Efficient Algorithms for Searching the Minimum Information Partition in Integrated Information Theory

Entropy ◽  
2018 ◽  
Vol 20 (3) ◽  
pp. 173 ◽  
Author(s):  
Jun Kitazono ◽  
Ryota Kanai ◽  
Masafumi Oizumi
Keyword(s):  
Information Theory ◽  
Information Integration ◽  
Computational Cost ◽  
Simulated Data ◽  
Essential Property ◽  
Minimum Information ◽  
Neural Data ◽  
The Brain ◽  
Integrated Information Theory ◽  
Integrated Information

The ability to integrate information in the brain is considered to be an essential property for cognition and consciousness. Integrated Information Theory (IIT) hypothesizes that the amount of integrated information ( Φ ) in the brain is related to the level of consciousness. IIT proposes that, to quantify information integration in a system as a whole, integrated information should be measured across the partition of the system at which information loss caused by partitioning is minimized, called the Minimum Information Partition (MIP). The computational cost for exhaustively searching for the MIP grows exponentially with system size, making it difficult to apply IIT to real neural data. It has been previously shown that, if a measure of Φ satisfies a mathematical property, submodularity, the MIP can be found in a polynomial order by an optimization algorithm. However, although the first version of Φ is submodular, the later versions are not. In this study, we empirically explore to what extent the algorithm can be applied to the non-submodular measures of Φ by evaluating the accuracy of the algorithm in simulated data and real neural data. We find that the algorithm identifies the MIP in a nearly perfect manner even for the non-submodular measures. Our results show that the algorithm allows us to measure Φ in large systems within a practical amount of time.

SPECIAL REVIEWS

PEDIATRICS ◽  
1951 ◽  
Vol 7 (2) ◽  
pp. 269-293
Author(s):  
CHARLES C. CHAPPLE
Keyword(s):  
The Body ◽  
Caloric Content ◽  
Maturation Factor ◽  
Drug Actions ◽  
The Common ◽  
Cellular Permeability ◽  
The One ◽  
External Stimuli ◽  
The Brain

A study has been made of the known phenomena which affect the biologic organism. Certain correlations have been found and other correlations are logically inferred. The common grounds of anatomic structures, the anatomic responses to endocrine stimuli, the interrelationships and interdependencies of the endocrines and external stimuli have been followed and have been related to cellular permeability and hyaluronic acid. Cellular phases, including the rhythmic alternations in physiologic functions, have been delineated and their importance stressed. Further, the probability is advanced that this rhythmicity originates physiologically in the brain but that the brain itself is capable of receiving transmissions from within and without the body, and disseminating them, again rhythmically, in normal or altered amplitude and frequency. Further experimental evidence of these correlations and their practical extrapolations into drug actions and the therapy of infections and metabolic disease will be reported and will include clinical, animal and in vitro studies. At present, the following conclusions seem justified: 1. No component of the body is capable of independent action. 2. Action in any component is reflected, according to its magnitude and directness of application, upon all the body. 3. All such actions are mediated by the brain. 4. There is a dynamic, rhythmic cyclicity in physiologic action which can be altered in amplitude and frequency. 5. These rhythms are alternations of cellular tenseness and relaxation. 6. The concomitants of the tense phase are compactness, impermeability, electric conductivity and contraction of all cells, and these characteristics might be described collectively as the factors operative in maturing the cell. The concomitants of the relaxed phase are laxness, permeability, electric resistance and expansion of all cells and are factors of growth. 7. The phase of tenseness is accompanied by an increase in certain hormonal activities and that of relaxation by an increase in others. 8. The hormones may be causes of the phase or the results of it. 9. Infectious disease cannot act as an extraneous agent capable of bringing its own engine into such a highly integrated mechanism but must act on the body through its ability to affect one of the body's mechanisms. 10. Drugs must act through the same channels available to disease. 11. Foods may contain, in addition to their caloric content, components capable of stimulating either the phase of cellular expansion or cellular compaction, particularly foods from the reproductive systems of plants or animals (milk, eggs, cereal, for example). 12. Vitamins each stimulate one phase and should be evaluated in terms of positive actions. 13. Inherent growth and maturation factors are not of fixed capacity in an individual but beyond certain limits must be supplied him or applied to him constantly. 14. The hormone most manifest in the tense phase is estrogen and so may be considered the maturation factor, and the one most manifest in the phase of relaxation or cell division is progesterone, which may be considered the growth factor.

Unique Contributions of Brain Stimulation to the Study of Consciousness: Where Neuroscience Meets Philosophy

CNS Spectrums ◽  
2010 ◽  
Vol 15 (3) ◽  
pp. 154-156
Author(s):  
Stefano Pallanti
Keyword(s):  
Ancient Greek ◽  
Eyes Closed ◽  
Technical Procedure ◽  
Eyes Open ◽  
Definition Of ◽  
The Individual ◽  
The Brain ◽  
Integrated Information Theory ◽  
Field Of Inquiry ◽  
Integrated Information

True progress in understanding how experience arises from the brain has been relatively slow when viewed from a historical perspective. Recently, several technologies to study and stimulate the brain have been applied to this field of inquiry. Such progress was made only 2,500 years after the ancient Greek philosopher Parmenides first adopted a technical procedure involving the application of formal logic instruments to explore the perception of experiences.At the phenomenological level, consciousness has been referred to as “what vanishes every night when we fall into dreamless sleep and reappears when we wake up or when we dream. It is also all we are and all we have: lose consciousness and, as far as you are concerned, your own self, and the entire world dissolves into nothingness”. According to the integrated information theory, consciousness is integrated information.The term “consciousness” therefore has two key senses: wakefulness and awareness. Wakefulness is a state of consciousness distinguished from coma or sleep. Having one's eyes open is generally an indication of wakefulness and we usually assume that anyone who is awake will also be aware. Awareness implies not merely being conscious but also being conscious of something. The broad definition of consciousness includes a large range of processes that we normally regard as unconscious (eg, blindsight or priming by neglected or masked stimuli).Both sleep and anesthesia are reversible states of eyes-closed unresponsiveness to environmental stimuli in which the individual lacks both wakefulness and awareness. In contrast to sleep, where sufficient stimulation will return the individual to wakefulness, even the most vigorous exogenous stimulation cannot produce awakening in a patient under an adequate level of general anesthesia.

scholarly journals QUEM ESTÁ NO COMANDO? NEUROCIÊNCIA, RESSONÂNCIA E DESAFIOS PARA A TEOLOGIA

2017 ◽  
Vol 49 (3) ◽  
pp. 611
Author(s):  
Rudolf Von Sinner
Keyword(s):  
Human Condition ◽  
The Body ◽  
Christian Theology ◽  
Human Being ◽  
Second Person ◽  
Third Person ◽  
Ancient Problem ◽  
The One ◽  
The Relationship ◽  
The Brain

RESUMO: A relação entre corpo e alma ou entre corpo, alma e espírito é um pro­blema antigo da antropologia, inclusive na teologia cristã. A questão continua em pauta hoje diante de novas descobertas e teorias nas neurociências. Praticamente migrou para a discussão da relação entre cérebro e mente. Hoje é consenso bastante amplo que quem comanda o corpo é o cérebro. Se aceitarmos isto, quem está no comando do cérebro? Sou eu, em primeira pessoa, minha alma, minha mente? Ou seria “ele”, em terceira pessoa, nosso próprio cérebro me determinando? E como ficaria na segunda pessoa – o ser humano como estando em relação a Deus a quem o chama de “tu”? Querendo superar preconceitos contra uma neurociên­cia determinista e uma teologia despreocupada com a ciência – e estas próprias posições, onde são defendidas –, o presente artigo procura tratar da condição humana em sua liberdade sempre precária e tolhida. Recorrendo à abordagem neurobiológica e psiquiátrica de Joachim Bauer, argumenta pela importância das relações do ser humano com o outro, com Deus e com o mundo, numa forma de ressonância (Hartmut Rosa). ABSTRACT: The relationship between body and soul or between body, soul and spirit is an ancient problem of anthropology, and also of Christian theology. In view of present day discoveries and new neuroscientific theories, the issue poses itself afresh. It practically migrated to the discussion of the relationship between brain and mind. Today, there is ample consensus that it is the brain that is in charge of the body. If we accept that, then who is in charge of the brain? Is it me, in the first person, my soul, my mind? Or is it “him”, in the third person, our own brain that determines me? And how about the second person – the human being in its relationship with God whom it calls “you”? Striving to overcome prejudices against a deterministic neuroscience, on the one hand, and a theology indifferent to science – and, indeed, such positions, wherever they are held – the present article seeks to deal with the human condition in its freedom, always precarious and restrained. Referring to neurobiological and psychiatric insights from Joachim Bauer, it argues for the importance of the relationship of the human being with the other, with God and with the world, in a form of resonance (Hartmut Rosa).

scholarly journals A Synergistic Workspace for Human Consciousness Revealed by Integrated Information Decomposition

2020 ◽  
Author(s):  
Andrea I. Luppi ◽  
Pedro A.M. Mediano ◽  
Fernando E. Rosas ◽  
Judith Allanson ◽  
John D. Pickard ◽  
...  
Keyword(s):  
Information Processing ◽  
Human Brain ◽  
Information Integration ◽  
Conscious Experience ◽  
Human Information Processing ◽  
Loss Of Consciousness ◽  
Mathematical Framework ◽  
Human Consciousness ◽  
The Brain ◽  
Integrated Information

AbstractA central goal of neuroscience is to understand how the brain synthesises information from multiple inputs to give rise to a unified conscious experience. This process is widely believed to require integration of information. Here, we combine information theory and network science to address two fundamental questions: how is the human information-processing architecture functionally organised? And how does this organisation support human consciousness? To address these questions, we leverage the mathematical framework of Integrated Information Decomposition to delineate a cognitive architecture wherein specialised modules interact with a “synergistic global workspace,” comprising functionally distinct gateways and broadcasters. Gateway regions gather information from the specialised modules for processing in the synergistic workspace, whose contents are then further integrated to later be made widely available by broadcasters. Through data-driven analysis of resting-state functional MRI, we reveal that gateway regions correspond to the brain’s well-known default mode network, whereas broadcasters of information coincide with the executive control network. Demonstrating that this synergistic workspace supports human consciousness, we further apply Integrated Information Decomposition to BOLD signals to compute integrated information across the brain. By comparing changes due to propofol anaesthesia and severe brain injury, we demonstrate that most changes in integrated information happen within the synergistic workspace. Furthermore, it was found that loss of consciousness corresponds to reduced integrated information between gateway, but not broadcaster, regions of the synergistic workspace. Thus, loss of consciousness may coincide with breakdown of information integration by this synergistic workspace of the human brain. Together, these findings demonstrate that refining our understanding of information-processing in the human brain through Integrated Information Decomposition can provide powerful insights into the human neurocognitive architecture, and its role in supporting consciousness.

William Croone’s theory of muscular contraction

1961 ◽  
Vol 16 (2) ◽  
pp. 158-178 ◽  
Keyword(s):  
Spinal Cord ◽  
Seventeenth Century ◽  
Muscle Contraction ◽  
Muscular Contraction ◽  
The Body ◽  
The Other ◽  
First Person ◽  
Muscular Movement ◽  
The One ◽  
The Brain

In the mid-seventeenth century William Croone had been the earliest among his contemporaries to concern himself with muscular motion. Thus, much of the discussion on muscular movement in the period after 1664 is either a commentary upon Croone’s views or is derived from them, and his influence was thus widespread, especially on the Continent. The background to Croone’s own views is largely that of Greek physiology as represented in the works of Galen. The first person who had a theory of muscle contraction seems to have been Erasistratus. Galen says that Erasistratus of Chios (fl. 290 b.c.) considered that when a muscle is filled with pneuma its breadth increases while its length diminishes and for this reason it is contracted. (1) Galen himself was impressed by the contractility of muscle and by the fact that this contractility depends on the nerve arising from the spinal cord and entering the muscle, where it branches repeatedly and sends its branches into all parts of the muscle. If the nerve, entering the muscle, be cut or injured or merely compressed the muscle loses all movement and sensitivity. (2) Galen considered that a muscle is made up of fibres and flesh. (3) The fibres of the muscle are continuous with those of its tendons at either end. In the body of the muscle itself the fibres are spread apart by the flesh contained in the interspaces between them. Each of these continuous fibres extending through both the tendon and the muscle Galen considers to be made up of finer fibres—on the one hand of inert and insensitive fibres of the same kind as occur in ligaments and, on the other hand, of sensitive fibres which are simply fine extensions of the branches of the nerves. (4) Galen does not, however, seem to offer, as does Erasistratus any mechanism to account for muscle contraction. To Galen the muscle is simply moved by the motor faculty which comes from the brain.

scholarly journals What Does ‘Information’ Mean in Integrated Information Theory?

Entropy ◽  
2018 ◽  
Vol 20 (12) ◽  
pp. 894 ◽  
Author(s):  
Olimpia Lombardi ◽  
Cristian López
Keyword(s):  
Information Theory ◽  
Theoretical Approach ◽  
The Self ◽  
The Other ◽  
Fundamental Properties ◽  
Other Hand ◽  
Formal Framework ◽  
The One ◽  
Integrated Information Theory ◽  
Integrated Information

Integrated Information Theory (IIT) intends to provide a principled theoretical approach able to characterize consciousness both quantitatively and qualitatively. By starting off identifying the fundamental properties of experience itself, IIT develops a formal framework that relates those properties to the physical substratum of consciousness. One of the central features of ITT is the role that information plays in the theory. On the one hand, one of the self-evident truths about consciousness is that it is informative. On the other hand, mechanisms and systems of mechanics can contribute to consciousness only if they specify systems’ intrinsic information. In this paper, we will conceptually analyze the notion of information underlying ITT. Following previous work on the matter, we will particularly argue that information within ITT should be understood in the light of a causal-manipulabilist view of information (López and Lombardi 2018), conforming to which information is an entity that must be involved in causal links in order to be precisely defined. Those causal links are brought to light by means of interventionist procedures following Woodward’s and Pearl’s version of the manipulability theories of causation.

scholarly journals The Mathematical Structure of Integrated Information Theory

2021 ◽  
Vol 6 ◽  
Author(s):  
Johannes Kleiner ◽  
Sean Tull
Keyword(s):  
Information Theory ◽  
Conscious Experience ◽  
Mathematical Structure ◽  
Starting Point ◽  
Special Cases ◽  
Axiomatic Definition ◽  
Definition Of ◽  
The Brain ◽  
Integrated Information Theory ◽  
Integrated Information

Integrated Information Theory is one of the leading models of consciousness. It aims to describe both the quality and quantity of the conscious experience of a physical system, such as the brain, in a particular state. In this contribution, we propound the mathematical structure of the theory, separating the essentials from auxiliary formal tools. We provide a definition of a generalized IIT which has IIT 3.0 of Tononi et al., as well as the Quantum IIT introduced by Zanardi et al. as special cases. This provides an axiomatic definition of the theory which may serve as the starting point for future formal investigations and as an introduction suitable for researchers with a formal background.

scholarly journals Brain in a Vat or Body in a World: Brainbound Versus Enactive View of Experience

2017 ◽  
Author(s):  
Evan Thompson ◽  
Diego Cosmelli
Keyword(s):  
Thought Experiment ◽  
The Body ◽  
Careful Examination ◽  
Living Body ◽  
The World ◽  
Neuronal Processes ◽  
Argument Proceeds ◽  
The Brain ◽  
Brain In A Vat ◽  
Embodied Agent

We argue that the minimal biological requirements for consciousness include a living body, not just neuronal processes in the skull. Our argument proceeds by reconsidering the brain-in-a-vat thought experiment. Careful examination of this thought experiment indicates that the null hypothesis is that any adequately functional “vat” would be a surrogate body, that is, that the so-called vat would be no vat at all, but rather an embodied agent in the world. Thus, what the thought experiment actually shows is that the brain and body are so deeply entangled, structurally and dynamically, that they are explanatorily inseparable. Such entanglement implies that we cannot understand consciousness by considering only the activity of neurons apart from the body, and hence we have good explanatory grounds for supposing that the minimal realizing system forconsciousness includes the body and not just the brain. In this way, we put the brain-in-a-vat thought experiment to a new use, one that supports the “enactive” view that consciousness is a life-regulation process of the wholeorganism interacting with its environment.

Hippocampal toxicity of metal base nanoparticles. Is there a relationship between nanoparticles and psychiatric disorders?

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Abbas Mohammadipour ◽  
Mahmoud Abudayyak
Keyword(s):  
Psychiatric Disorders ◽  
Hippocampal Neurogenesis ◽  
The Body ◽  
Metal Base ◽  
Future Studies ◽  
Present Information ◽  
Gene Expression Alteration ◽  
Neuro Inflammation ◽  
The One ◽  
The Brain

Abstract Metal base nanoparticles are widely produced all over the world and used in many fields and products such as medicine, electronics, cosmetics, paints, ceramics, toys, kitchen utensils and toothpastes. They are able to enter the body through digestive, respiratory, and alimentary systems. These nanoparticles can also cross the blood brain barrier, enter the brain and aggregate in the hippocampus. After entering the hippocampus, they induce oxidative stress, neuro-inflammation, mitochondrial dysfunction, and gene expression alteration in hippocampal cells, which finally lead to neuronal apoptosis. Metal base nanoparticles can also affect hippocampal neurogenesis and synaptic plasticity that both of them play crucial role in memory and learning. On the one hand, hippocampal cells are severely vulnerable due to their high metabolic activity, and on the other hand, metal base nanoparticles have high potential to damage hippocampus through variety of mechanisms and affect its functions. This review discusses, in detail, nanoparticles’ detrimental effects on the hippocampus in cellular, molecular and functional levels to reveal that according to the present information, which types of nanoparticles have more potential to induce hippocampal toxicity and psychiatric disorders and which types should be more evaluated in the future studies.

Sign in / Sign up

Export Citation Format

Share Document