Metzinger's book, "Neural Correlates of Consciousness: Empirical and Conceptual Questions," argues that consciousness is a phenomenal self-model, a representation the brain constructs to guide action and survive. The central thesis is that the feeling of "what it is like" to be a conscious subject is a direct result of this sophisticated internal modeling process, which does not require subjective experience itself to exist. He contends that empirical research should focus on understanding the specific neural mechanisms and representational content that give rise to this self-model, moving beyond the search for a single "seat" of consciousness.
A key takeaway is that while consciousness is a biological phenomenon, its subjective quality is inseparable from the brain's ongoing construction of a coherent, albeit not perfectly accurate, representation of the world and the self within it. The book emphasizes the need for interdisciplinary collaboration between neuroscience, philosophy, and psychology to unravel the complex interplay between brain activity and conscious experience, suggesting that a complete understanding requires grappling with both empirical data and fundamental conceptual challenges regarding the nature of representation and subjectivity.
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Key concepts
- Phenomenal Self-Model — The brain's internal representation of itself as a subject experiencing the world.
- Transparency of Representation — The tendency for representational content to be experienced as the world itself, rather than as a representation of the world.
- Global Workspace Theory — A model proposing that information becomes conscious when broadcast to a widespread neural network.
- Higher-Order Thought Theory — The idea that a mental state becomes conscious when accompanied by a higher-order thought about that state.