JonoThora: Psionics expansion (01a + 01b): content authored / LaTeX-restored per local submodule; lint-clean.

2026-05-11T20:54:20Z

Psionics expansion (01a + 01b): content authored / LaTeX-restored per local submodule; lint-clean.

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{{Audience_Sidebar
| difficulty = Intermediate
| reading_time = 4 minutes
| prerequisites = [[Psionics_Primer]]; basic neuroscience.
| if_too_advanced_see = [[Global_Workspace_Theory]]
| if_you_want_the_math_see = [[Global_Workspace_Theory]]
}}

{{Person_Vital_Stats
| name = Stanislas Dehaene
| birth = 12 May 1965 (Roubaix, France)
| death = (living)
| nationality = French
| field = Cognitive neuroscience
| affiliation = Collège de France (Experimental Cognitive Psychology Chair); NeuroSpin (Saclay)
| key_works = Dehaene-Naccache 2001; ''Consciousness and the Brain'' (2014)
| era = Late 20th to early 21st century
}}

== Summary ==

'''Stanislas Dehaene''' is a French cognitive neuroscientist at the Collège de France and director of NeuroSpin (the Saclay cognitive-neuroimaging centre), best known for two major contributions: pioneering work on the '''neural basis of numerical cognition''' (the "number sense") and the development — with Jean-Pierre Changeux and Lionel Naccache — of the '''Global Neuronal Workspace (GNW)''' theory of consciousness, a neuroscientific refinement of [[Bernard_Baars|Baars]]'s [[Global_Workspace_Theory|GWT]].

== Life ==

Dehaene trained in mathematics and cognitive psychology at the École Normale Supérieure, completed his PhD with Jean-Pierre Changeux at the Collège de France, and has been on the Collège de France faculty since 2005. He directs NeuroSpin at the CEA Saclay campus, France's premier cognitive-neuroimaging research centre.

He has received numerous awards including the Brain Prize (2014, jointly).

== Key Contributions ==

=== Number sense and mathematical cognition ===

Dehaene's pre-consciousness research focused on the '''neural basis of numerical cognition''':

* '''Approximate number system''' — humans and other animals share a non-symbolic, approximate magnitude representation localised to the intraparietal sulcus.
* '''Symbolic-arithmetic''' acquisition recruits left-hemisphere language-related regions in addition to the parietal magnitude system.
* '''Triple-code model''' of number processing — magnitude, verbal, visual-Arabic codes — with distinct neural substrates.

''The Number Sense'' (1997, expanded 2011) is the classic exposition.

=== Global Neuronal Workspace (GNW) theory ===

With Changeux and Naccache, Dehaene developed the '''Global Neuronal Workspace''' framework — a neurobiological refinement of Baars's cognitive Global Workspace. Specific contributions:

* '''Long-range axonal projections''' from layer V pyramidal neurons in prefrontal and parietal cortex constitute the physical "workspace" hardware.
* '''Conscious access''' corresponds to a sudden, non-linear "'''ignition'''" event — coordinated activation of the prefrontal-parietal network — distinct from the linear stimulus-driven activation of sensory cortex.
* '''Subliminal processing''' can be extensive but is bounded by absence of ignition.

The GNW framework makes specific empirical predictions about the spatiotemporal dynamics of conscious-vs-unconscious processing, many of which have been confirmed in EEG / MEG / fMRI studies.

=== Consciousness empirical paradigms ===

Dehaene's lab has produced foundational experimental paradigms for studying consciousness: '''subliminal priming''', '''attentional blink''', '''masking''' protocols. These paradigms are now standard in cognitive-neuroscience consciousness research.

=== Reading-brain research ===

Mainstream research programme on the '''neural basis of reading''': the "visual word form area" in left fusiform cortex and its cross-cultural reliability. ''Reading in the Brain'' (2009) is the popular exposition.

== Reception ==

Dehaene is among the most respected mainstream cognitive neuroscientists. GNW is one of the two dominant mainstream theories of consciousness (with [[Integrated_Information_Theory|IIT]]). His mathematical-cognition and reading-brain work is universally cited.

In the [[Psionics|psionic framework]], Dehaene's GNW is significant for providing a '''well-characterised neural network — the prefrontal-parietal ignition system — as a candidate substrate for ψ-field coupling to conscious experience'''. The ignition dynamics (sudden, all-or-none, network-wide) are particularly suggestive: nonlinear network transitions are the kind of process where small field-coupling effects could plausibly have measurable consequences.

== Bibliography ==

* Dehaene, S. (1997, 2011). ''The Number Sense.'' Oxford University Press.
* Dehaene, S., Naccache, L. (2001). "Towards a cognitive neuroscience of consciousness: basic evidence and a workspace framework." ''Cognition'' 79: 1-37.
* Dehaene, S. (2009). ''Reading in the Brain.'' Viking.
* Dehaene, S. (2014). ''Consciousness and the Brain.'' Viking.

== See Also ==

* [[Bernard_Baars]]
* [[Christof_Koch]]
* [[Giulio_Tononi]]
* [[Global_Workspace_Theory]]

== External Links ==

* Wikipedia: Stanislas Dehaene
* Collège de France faculty profile.
* NeuroSpin (CEA Saclay).

== References ==

* As above.

[[Category:Psionics]]
[[Category:Biographies]]
[[Category:Consciousness Studies]]
[[Category:Neuroscience]]

Stanislas Dehaene - Revision history

JonoThora: Psionics expansion (01a + 01b): content authored / LaTeX-restored per local submodule; lint-clean.