One of the greatest challenges of consciousness research is to understand the relationship between consciousness and its implementing substrate. Current research into the neural correlates of consciousness regards the biological brain as being this substrate, but largely fails to clarify the nature of the brain-consciousness connection. A popular approach within this research is to construe brain-consciousness correlations in causal terms: the neural correlates of consciousness are the causes of states of consciousness. After introducing the notion of the neural correlate of (...) consciousness, we argue (in section 2) that this causal strategy is misguided. It implicitly involves an undesirable dualism of matter and mind and should thus be avoided. A non-causal account of the brain-mind correlations is to be preferred. We favor the theory of the identity of mind and brain, according to which states of phenomenal consciousness are identical with their neural correlates. Research into the neural correlates of consciousness and the theory of identity (in the philosophy of mind) are two major research paradigms that hitherto have had very little mutual contact. We aim to demonstrate that they can enrich each other. This is the task of the third part of the paper in which we show that the identity theory must work with a suitably defined concept of type. Surprisingly, neither philosophers nor neuroscientists have taken much care in defining this central concept; more often than not, the term is used only implicitly and vaguely. We attempt to open a debate on this subject and remedy this unhappy state of affairs, proposing a tentative hierarchical classification of phenomenal and neurophysiological types, spanning multiple levels of varying degrees of generality. The fourth part of the paper compares the theory of identity with other prominent conceptions of the mind-body connection. We conclude by stressing that scientists working on consciousness should engage more with metaphysical issues concerning the relation of brain processes and states of consciousness. Without this, the ultimate goals of consciousness research can hardly be fulfilled. (shrink)

We present a theoretical view of the cellular foundations for network-level processes involved in producing our conscious experience. Inputs to apical synapses in layer 1 of a large subset of neocortical cells are summed at an integration zone near the top of their apical trunk. These inputs come from diverse sources and provide a context within which the transmission of information abstracted from sensory input to their basal and perisomatic synapses can be amplified when relevant. We argue that apical amplification (...) enables conscious perceptual experience and makes it more flexible, and thus more adaptive, by being sensitive to context. Apical amplification provides a possible mechanism for recurrent processing theory that avoids strong loops. It makes the broadcasting hypothesized by global neuronal workspace theories feasible while preserving the distinct contributions of the individual cells receiving the broadcast. It also provides mechanisms that contribute to the holistic aspects of integrated information theory. As apical amplification is highly dependent on cholinergic, aminergic, and other neuromodulators, it relates the specific contents of conscious experience to global mental states and to fluctuations in arousal when awake. We conclude that apical dendrites provide a cellular mechanism for the context-sensitive selective amplification that is a cardinal prerequisite of conscious perception. (shrink)

Stať se snaží analyzovat myšlenky málo známého rukopisu Sigmunda Freuda z roku 1895, v němž usiloval o nalezení biologických základů lidské psychiky. Tato práce je pozoruhodná ze dvou důvodů. Jednak představuje úvahy, které se výrazně od- lišují od toho, co je pro Freuda v oblasti psychologie tak typické. Freud se zde, až na výjimky, nezabývá psychoanalýzou či studiemi o hysterii, nýbrž popisuje, co by mohlo být základem těchto psychologických jevů na neurofyziologické úrovni. Druhým pozoruhodným faktem je, že tento manuskript byl (...) pozapome- nut až do poloviny 20. století, kdy byl vytištěn pod názvem Projekt vědecké psychologie. A jak je známo, neurofyziologická studia lidské mysli spojená s analýzou kognitivních funkcí se v ri- gorózní podobě objevují až na počátku 60. let. Stať se proto pokouší ukázat základní principy Projektu a naznačit, v čem byl Freud inspirativním průkopníkem moderních neurofyziologických přístupů k lidské mysli. (shrink)

In this collection of essays, experts in the field of consciousness research shed light on the intricate relationship between conscious and unconscious states of mind. Advancing the debate on consciousness research, this book puts centre stage the topic of commonalities and differences between conscious and unconscious contents of the mind. The collection of cutting-edge chapters offers a breadth of research perspectives, with some arguing that unconscious states have been unjustly overlooked and deserve recognition for their richness and wide scope. Others (...) contend that significant differences between conscious and unconscious states persist, highlighting the importance of their distinct characteristics. Explorations into the nature of the transition from unconscious to conscious mind further complicate the picture, with some authors questioning whether a sharp divide between unconscious and conscious states truly exists. Delving into ontological, epistemological, and methodological issues, this thought-provoking text challenges established paradigms and paves the way for a reimagining of consciousness research. It does so in an understandable and accessible way, making this a perfect companion to both experts and students of philosophy, psychology, and related fields. (shrink)

Argumentace Tomáše Hříbka proti fenomenálnímu charakteru se opírá především o Dennettova stanoviska. Dennettem dlouhodobě preferovaná strategie při vypořádání se s tímto problémem je metodologický naturalismus. Tato strategie jistě přinesla své ovoce, zejména je-li řeč o otevření skutečně kritické diskuse na téma kválií. Problém vědomí je však v současnosti traktován spíše v rámci materialistické metafyziky, než z pohledu Dennettova metodologického naturalismu. Tato preference má své empirické, ale i filosofické důvody, o nichž jsme hovořili s Tomášem Marvanem v knize Vědomí a jeho (...) teorie. Protože Hříbkova monografie reaguje na některé názory z této knihy, komentuji Hříbkovy reakce a upřesňuji naše postoje. Zároveň se vyjadřuji k zařazení naší pozice v rámci materialistické metafyziky k materialismu typu B. V druhé části statě se zabývám problémem fenomenálního charakteru vědomé zkušenosti a snažím se argumentovat, že tento těžký problém nelze odstranit pouze tím, že se prokáže neudržitelnost tradičního chápání kválií. (shrink)