Theoretical window: psychedelics as access

The theoretical window is an interpretive framework that presents psychedelics not as mere producers of hallucinations, but as means of access: they would open temporal windows onto computational (or physical) regimes of the cortex that are normally inaccessible. The plate gathers several proposed mechanisms, ordered by degree of empirical validation, from the most solid to the most speculative.

Central thesis

The guiding idea is that psychedelic states grant transient access to modes of functioning that the ordinary cortex does not explore. The usual cortex is described here as a constrained computational regime: inaccessible subspaces, filtered information channels, sub-critical dynamics, limited integrated information. Under psychedelics, these constraints would be temporarily lifted: reopened windows, access to new regimes, active orthogonal channels, critical or super-critical dynamics, increased integrated information, and perhaps functional quantum coherences. The plate stresses the point: these states are not only contents to be documented, but epistemological instruments allowing one to explore the very conditions of cognition, information and consciousness.

Proposed mechanisms

The plate distinguishes four mechanisms according to their empirical support.

First, the reopening of closed temporal windows (Dölen and collaborators, Nature). Several psychedelics (MDMA, LSD, psilocybin, ketamine, ibogaine) would transiently reopen critical periods of plasticity that are normally closed in mice. This, according to the plate, is the most robust finding: a level of solid empirical data.

Second, critical states (Toker and collaborators 2021; Atasoy and collaborators 2017, 2018): a shift of the brain toward criticality, where complexity and diversity are maximal and where integrated information increases. EEG and MEG signatures (Lempel-Ziv complexity, diversity of patterns) support this reading. Level: solid empirical data.

Third, orthogonal information channels (Gallimore and collaborators): access to information spaces decorrelated from the usual sensorimotor dynamics. An original theoretical hypothesis, with still embryonic empirical support.

Fourth, the quantum substrate Orch-OR (Hameroff and Penrose, 1996; Penrose, 2014): quantum coherence in microtubules as a support for integration and conscious experience. The plate describes it as highly speculative and contested (decoherence at 37 degrees, time constraints).

Theoretical consequences

If this framework holds, it broadens the space of cognitive possibilities and demands revisions: models of cognition beyond classical processing, theories of consciousness, the role of neuronal integration (IIT, Phi), and the boundaries of the neuronal and physical possible. The plate evokes a new epistemology: moving from a representational approach to a broadened experimental one, the subject becoming an explorer of regimes of cognitive existence.

Epistemic status and debates

The plate is cautious about its own status. The work of Dölen and of Toker would provide solid data, Gallimore proposes original hypotheses, and Orch-OR remains a minority and highly speculative view. The methodological limits are made explicit: Phi is not measurable in vivo in humans, the available evidence (PCI, Lempel-Ziv complexity, entropy) consists only of correlates, correlation is not causation, and cross-species generalisation is limited. Many questions remain open: the exact nature of the accessible regimes, the stability of access after the experience, the role of set and setting and of integration, transferability to ordinary waking, the ontological status of lived phenomena (real or simulated), and the relation between mechanisms (complementary or competing). The unifying hypothesis, presented as a research project, is that psychedelics act as keys temporarily opening computational and physical doors. The plate finally recalls that it does not constitute a definitive medical, philosophical or scientific opinion, and has only an informative and exploratory value.

Sources

• Nardou, Dölen and collaborators (2023, Nature), reopening of critical periods of plasticity by psychedelics.
• Toker and collaborators (2022), criticality and complexity under psychedelics.
• Atasoy and collaborators (2017, 2018), connectome harmonics and diversity of brain states.
• Gallimore, information channels and state spaces under psychedelics.
• Hameroff and Penrose (1996), Penrose and Hameroff (2014), the Orch-OR theory of consciousness.
• Tononi, integrated information theory (IIT) and neuronal integration.
• Carhart-Harris and collaborators (2014), brain entropy and psychedelic states.