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The Radically Embodied Conscious Cybernetic Bayesian Brain: From Free Energy to Free Will and Back Again.

Adam Safron

Entropy (Basel, Switzerland) June 20, 2021 DOI: 10.3390/e23060783 via PubMed

Summary

AI-generated from the abstract

Explaining goal-directed behavior may require rethinking mental homunculi and Cartesian theaters as embodied self-models (ESMs)—body maps with agentic properties that function as predictive-memory systems and cybernetic controllers. ESMs are proposed as a major organizing principle for neural architectures, providing foundational inductive biases that constrain inference spaces during cognitive and affective development. Drawing on the Free Energy Principle and Active Inference, the account describes how consciously imagined goal states influence action selection via predictive coding and backward-chained imaginings. Embodied experience supplies empirical priors, and bidirectional linkages between sensory modalities and frontal-parietal control hierarchies infuse perception with somatic-motoric properties, solving frame problems. The manuscript offers neurophenomenological treatments of qualia like pleasure, pain, and desire, and argues that radically embodied minds create foundations for intelligence, consciousness, and will.

Study at a glance

Characteristics Theoretical or philosophical paper Peer reviewed
Keywords Bayesian brain Free energy principle Active inference Agency Cognitive-affective development
Citations 53
Key finding Embodied self-models (ESMs) serve as predictive-memory systems and cybernetic controllers that provide foundational inductive biases for cognitive development and enable intentional action selection via consciously imagined goal realization.

Abstract

Drawing from both enactivist and cognitivist perspectives on mind, I propose that explaining teleological phenomena may require reappraising both "Cartesian theaters" and mental homunculi in terms of embodied self-models (ESMs), understood as body maps with agentic properties, functioning as predictive-memory systems and cybernetic controllers. Quasi-homuncular ESMs are suggested to constitute a major organizing principle for neural architectures due to their initial and ongoing significance for solutions to inference problems in cognitive (and affective) development. Embodied experiences provide foundational lessons in learning curriculums in which agents explore increasingly challenging problem spaces, so answering an unresolved question in Bayesian cognitive science: what are biologically plausible mechanisms for equipping learners with sufficiently powerful inductive biases to adequately constrain inference spaces? Drawing on models from neurophysiology, psychology, and developmental robotics, I describe how embodiment provides fundamental sources of empirical priors (as reliably learnable posterior expectations). If ESMs play this kind of foundational role in cognitive development, then bidirectional linkages will be found between all sensory modalities and frontal-parietal control hierarchies, so infusing all senses with somatic-motoric properties, thereby structuring all perception by relevant affordances, so solving frame problems for embodied agents. Drawing upon the Free Energy Principle and Active Inference framework, I describe a particular mechanism for intentional action selection via consciously imagined (and explicitly represented) goal realization, where contrasts between desired and present states influence ongoing policy selection via predictive coding mechanisms and backward-chained imaginings (as self-realizing predictions). This embodied developmental legacy suggests a mechanism by which imaginings can be intentionally shaped by (internalized) partially-expressed motor acts, so providing means of agentic control for attention, working memory, imagination, and behavior. I further describe the nature(s) of mental causation and self-control, and also provide an account of readiness potentials in Libet paradigms wherein conscious intentions shape causal streams leading to enaction. Finally, I provide neurophenomenological handlings of prototypical qualia including pleasure, pain, and desire in terms of self-annihilating free energy gradients via quasi-synesthetic interoceptive active inference. In brief, this manuscript is intended to illustrate how radically embodied minds may create foundations for intelligence (as capacity for learning and inference), consciousness (as somatically-grounded self-world modeling), and will (as deployment of predictive models for enacting valued goals).

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