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Neurophysiological mechanisms and consciousness.

O D Creutzfeldt

    Ciba Foundation Symposium
    |January 1, 1979
    PubMed
    Summary

    Consciousness involves integrated brain processes, where action systems and symbolic self-representation, enabled by linguistic competence, are crucial for subjective experience. This highlights the link between motor control and conscious awareness.

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    Area of Science:

    • Neuroscience
    • Cognitive Science
    • Philosophy of Mind

    Background:

    • Consciousness is viewed as an experience, potentially explainable by neurophysiological mechanisms.
    • Thalamocortical systems in the neocortex represent world aspects, but lack unified representation.
    • Neocortical outputs integrate into action systems, forming feedback loops crucial for consciousness.

    Purpose of the Study:

    • To explore the neurophysiological basis of consciousness and subjective experience.
    • To elucidate the role of action systems, basal ganglia, and reticular substance in conscious processing.
    • To investigate the significance of symbolic self-representation and linguistic competence in consciousness.

    Main Methods:

    • Conceptual analysis of consciousness as a behavioral and experiential state.
    • Examination of neurophysiological pathways, including thalamocortical projections, basal ganglia, and reticular substance.
    • Discussion of internal and external feedback loops in brain function.

    Main Results:

    • Consciousness arises from the synthesis of distributed cortical representations through action.
    • Basal ganglia play a key role in consciousness and synthesis of cortical representations, linking motor performance and awareness.
    • The reticular substance acts as a gating mechanism for thalamic access to the cortex.
    • Symbolic self-representation, based on linguistic competence, forms the basis of conscious experience (reflective loop).

    Conclusions:

    • Consciousness is intricately linked to motor control and action systems.
    • Symbolic self-representation, dependent on linguistic competence, is fundamental for conscious experience.
    • Understanding consciousness requires integrating neurophysiological, behavioral, and representational perspectives.

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