La Scala di Luys e la Teoria Polivagale di Porges/en

🏥 Fonte primaria: opere del Prof. Jules Bernard Luys (1828-1897)
Questa pagina deriva dalle opere e dalle ricerche sperimentali del Prof. Jules Bernard Luys (1828-1897) — neurologo francese, medico capo del manicomio dell'ospedale della Charité di Parigi, autore di studi neuroanatomici fondamentali (l'omonimo «corpo di Luys» del cervello — il nucleo subtalamico — è una sua scoperta), e tra i principali sperimentatori scientifici della fascinazione magnetica e dell'ipnotismo medico nel tardo Ottocento parigino. Luys è uno dei pochi medici accademici di alto rango ad aver verificato sperimentalmente, su pazienti psichiatrici, i fenomeni della fascinazione di Donato. Documenti Drive ISI-CNV: 📁 Folder luys fascinazione — cartella Drive ISI-CNV con i materiali Luys, le ricerche alla Charité e gli articoli sulla fascinazione medica. Opere chiave di Luys (riferimento): J.-B. Luys, Recherches sur le système nerveux cérébro-spinal, Paris, Baillière, 1865. J.-B. Luys, Le cerveau et ses fonctions, Paris, Baillière, 1876. J.-B. Luys, Les émotions chez les sujets en état d'hypnotisme, Paris, J.-B. Baillière et fils, 1887. J.-B. Luys, Leçons cliniques sur les principaux phénomènes de l'hypnotisme dans leurs rapports avec la pathologie mentale, Paris, Carré, 1890. J.-B. Luys e G. Encausse (Papus), Du dédoublement des opérations cérébrales et du rôle isolé de chaque hémisphère dans les phénomènes de la pathologie mentale, 1888.

This page relates the schema of hypnotic states of Jules Bernard Luys (1890) to Stephen Porges' Polyvagal Theory (1994-2011). The correspondence is not metaphorical: it concerns the same autonomic nervous system, described from two scientific perspectives separated by over a century.

The relevance to the Paret Method is direct: the fascination of Donato and the therapeutic work of Luys acted on the autonomic nervous system in a physiologically precise manner — long before neurobiology had the tools to explain it.

Luys' Scale (1890)

Luys proposes a visual "puits" (well) representation of hypnotic states, from the surface to the depths:

Level	State	Somatic characteristics	Psychic characteristics
1 (surface)	Fascination (Brémaud/Donato)	Partial cutaneous anesthesia, mild catalepsy	Suggestibility, maintained waking consciousness, partial amnesia
2	Catalepsy	Muscles malleable like wax, extreme flexibility, anesthesia	Eyes open, automatic emotional expressiveness, no consciousness
3	Lucid somnambulism	Apparent motor normality	Speaks, responds, acts — but unconscious, total amnesia upon awakening
4 (depth)	Lethargy	Complete muscular resolution, muscle strength doubled on dynamometer, total anesthesia	Absent consciousness, optical and emotional hyperesthesia
5 (limit)	Ultra-lethargy	Almost imperceptible pulse, rarefied breathing, vital risk	Total dissociation

Porges' Polyvagal Theory

Between 1994 and 2011, Stephen Porges developed the Polyvagal Theory, which re-describes the autonomic nervous system not as a simple sympathetic/parasympathetic balance, but as an evolutionary hierarchy with three levels:

Evolutionary level	System	Nerve	State	Behavior
3 (most recent)	Ventral vagal	Myelinated vagus nerve (ventral)	Social safety	Connection, calm, communication, flexibility; vocal tone, facial expression, attention
2	Sympathetic	Sympathetic-adrenergic system	Mobilization	Fight/flight, stress, agitation, high energy
1 (most ancient)	Dorsal vagal	Unmyelinated vagus nerve (dorsal)	Immobilization	Freezing, dissociation, collapse, "apparent death"

The hierarchy functions through descending inhibition: under conditions of safety, the ventral system inhibits the sympathetic, which inhibits the dorsal. Under threat, the system descends levels: first it mobilizes (sympathetic), then — if mobilization fails — it collapses into dorsal immobilization.

The Correspondence Between the Two Scales

The overlap is extraordinary:

Luys (1890)	Porges (1994-2011)	Common physiological correlate
Ordinary wakefulness	Active ventral vagal system	Ventral vagal tone: social connection, communication, calm alertness
Fascination (Donato)	Ventral→dorsal transition	Reduction of ventral tone, onset of cortical inhibition; suggestibility = reduction of the prefrontal "brake"
Catalepsy	Partial dorsal vagal activation	Partial immobilization: muscles locked in position (like the "fear-induced catalepsy" of mammals), cutaneous anesthesia
Somnambulism	Dorsal with ventral windows	Automatic communication possible (preserved reflex arcs) but without conscious subjectivity
Lethargy	Full dorsal vagal	Total immobilization, bradycardia, hypotension, complete anesthesia, muscle strength available only as a reflex
Ultra-lethargy	Critical dorsal / Shutdown	Almost imperceptible pulse, rarefied breathing: the "apparent death" of reptiles and mammals in extreme danger states

What the Correspondence Explains

1. Cutaneous Anesthesia

Luys observes that during lethargy, cutaneous sensitivity completely disappears. Porges explains: the dorsal vagal system is the "apparent death" system — in animals that feign death to escape predators, cutaneous anesthesia is adaptive (not feeling wounds). It is the same anesthesia that Luys measures with pins.

2. Doubled Muscle Strength

Luys measures 10-12 kg of normal force → 20-25 kg in lethargy. This seems paradoxical: how can a "shut down" system produce more force?

The polyvagal answer: when the prefrontal cortex and the ventral system "shut down," the spinal reflexes, left without higher inhibition, produce contractions of maximal intensity. This is the phenomenon of hyperreflexia in patients with spinal cord injuries: without descending inhibition, reflexes are exaggerated. In lethargy, cortical inhibition ceases — muscle reflexes are enhanced.

3. The Suggestibility of Fascination

Porges describes the ventral system as the system of "social connection" — the prefrontal "brake" that filters information, assesses safety, maintains the distinction between self and other. When ventral tone decreases (but does not collapse into dorsal), this filter lowers: the subject becomes more receptive, less critical, more influenceable.

This is precisely the suggestibility of Donato's fascination: not a break in consciousness, but a loosening of the prefrontal brake. Consciousness is present but the critical "no" is more difficult. Luys describes it as "complete credulity."

4. Dédoublement and Hemi-catalepsy

Luys demonstrates that he can place the two hemispheres in different states by lifting only one eyelid. In polyvagal terms: the ventral vagal circuits of the two hemispheres can be asymmetrically activated — one enters a cataleptic state while the other remains more vigilant. This asymmetry is documented in modern research on autonomic nervous system asymmetry.

5. Optical Hyperesthesia in Lethargy

Luys observes that in lethargy, with total cutaneous anesthesia, sensitivity to light increases enormously (the subject "sees" through a wooden screen). In polyvagal terms: when the dorsal system takes control, primary sensory systems (visual, auditory) can acquire extreme sensitivity — as in animals in a "freezing" state that maintain hypersensitivity to predators while being immobile.

6. Emotions in Catalepsy: Colored Balls

Luys observes that in the cataleptic state, emotional regions ignite with extreme intensity (blue ball = intense repulsion, yellow ball = ecstasy). In polyvagal terms: when the ventral system lowers, subcortical emotional responses (amygdala, limbic system) are no longer modulated by the prefrontal cortex — they emerge with pure, unfiltered, socially unregulated intensity. It is the same emotional intensity observed in traumatic states or deep meditations.

The Scale as a Therapeutic Map

Polyvagal understanding transforms Luys' scale from a simple phenomenological description into a **therapeutic map**:

Fascination operates in the ventral→dorsal transition zone: it lowers the prefrontal brake without causing traumatic dissociation
Catalepsy leads to the first dorsal level: subcortical structures are accessible, body memories are available
Lethargy is the level of maximum therapeutic receptivity — but requires experience to be managed without risks
Luys' rotating mirror is a rhythmic visual trigger that, in modern terms, synchronizes the nervous system through repetitive optical stimulation (like EMDR, like certain meditation rhythms)

Luys in the program of the Revue d'Hypnologie: "The state of fascination is, in a word, the most usable phase of the manifestations of hypnotism, and the field of action par excellence for the therapeutics of diseases of the nervous system."

In polyvagal terms: fascination is the "therapeutic window" — far enough down the scale to be accessible without being so far down as to become dangerous or traumatizing.

Awakening as "Co-regulation"

Porges identifies "co-regulation" — the ability of one nervous system to regulate another — as the fundamental mechanism of therapy and the therapeutic relationship. The therapist's voice, tone, gaze, and physical presence transmit "safety" to the patient's nervous system through the neuroception system.

Luys describes the same phenomenon when he teaches awakening: not abrupt (potentially traumatic), but gradual with the verbal suggestion "you will wake up in one minute" — and final verification "where are you? who am I?" to ensure the ventral system has returned to activity.

The protection protocol for "spontaneously fascinable subjects" — giving the suggestion that they allow themselves to be hypnotized only by the operator — is a form of nervous system boundary regulation: creating an exclusive safe "co-regulation."

Donato and Neuroception

Porges introduces the concept of neuroception: the unconscious assessment of safety/danger by the nervous system, which precedes and determines which level of the scale is activated. Neuroception is not a cognitive decision — it occurs in the brainstem, before consciousness.

Donato understands this intuitively when he says his secret is "absolute certainty" and "surprise." His gaze, his presence, his impatience transmit a neuroceptive signal to the subject's nervous system: "this person has absolute authority over the space" — the subject's ventral system adapts, then yields. It is not conscious suggestion: it is neuroception.

Morselli describes it thus: "Donato told me that his secret is the special way of fixing his eyes without blinking. It is this simple effort of will on his own ocular muscles that the public mistakes for a particular and terrible power of the gaze."

The fixed gaze without blinking is a very powerful neuroceptive signal: in animals, a predator's fixed gaze produces reflexive immobilization in the prey (the dorsal system activates). Donato unconsciously uses this primary evolutionary mechanism.

The Paret Method and Polyvagal Theory

Paret has developed in the Paret Method the understanding that deep fascination states activate the parasympathetic system — the vagal system. This is correct in a polyvagal sense: fascination operates primarily through the dorsal vagal system (immobilization) with elements of the ventral system (suggestibility, relationship).

Therapeutic catalepsy in the Paret Method — the state where the body is fixed but the nervous system is maximally receptive — corresponds to the cataleptic level in Luys' scale: the ventral system is lowered enough to allow deep restructuring, the dorsal system is active enough to produce the immobilization that makes work on the somatic nervous system possible.

Luys' therapeutic applications (shaking palsy, tremor, tinnitus, hemianesthesia, blepharospasm) find polyvagal meaning: many of these conditions have a component of autonomic nervous system dysregulation — fascination/catalepsy rebalances them by directly accessing the autonomic hierarchy, bypassing cognitive control.

Primary Sources

J. Luys, Leçons cliniques sur les principaux phénomènes de l'hypnotisme, 1890: Drive ISI-CNV
J. Luys, Revue d'Hypnologie, 1890: Drive ISI-CNV
S. Porges, The Polyvagal Theory, Norton, 2011
S. Porges, «Orienting in a defensive world: Mammalian modifications of our evolutionary heritage», 1995