The Baron Étienne Félix D’Hénin de Cuvillers (2026)

Brice LeMaire

Faculté de Chirurgie dentaire Odontologie, Université Cote D’Azur, Nice, France

Donald Moss

College of Integrative Medicine and Health Sciences, Saybrook University, Pasadena, California

Correspondence: Dmoss@saybrook.edu

Keywords: Étienne Félix D’Hénin de Cuvillers, James Braid, animal magnetism, hypnotism nomenclature, imaginationist

Baron Étienne Félix D’Hénin de Cuvillers was a pivotal but often overlooked figure in the history of hypnosis.[1] Living in France from 1755 to 1841, he was a contemporary of Franz Anton Mesmer and an active member—and Secretary—of Mesmer’s Society of Animal Magnetism in Paris. He founded and served as the first editor of an early journal, Archives du Magnétisme Animal.

Unlike Mesmer, who believed in a magnetic fluid as the cause of mesmeric phenomena, de Cuvillers aligned with Abbe de Faria’s view that these effects were driven by the imagination (de Faria, 1819). He can be credited as the first to introduce several terms based on the prefix “hypn,” derived from the Greek words hýpnos (sleep) and enýpnion (daydream or sleep accompanied by dreams), predating James Braid’s usage by two decades (Braid, 1843; Gravitz, 1993).

De Cuvillers traced mesmerism and mesmeric gestures back to ancient traditions across cultures, identifying a particular hand gesture called the Abéaston—an open hand held forward—as a universal symbol for induction into a trance-like state. He linked this gesture to rituals in ancient Greece, Egypt, India (Brahmin priests), and early Christianity (such as Jesus’ healing gestures). He argued that this posture, evoking stillness and protection, naturally leads to relaxation and hypnosis without invoking any mystical magnetic fluid.

Life and Career

De Cuvillers had a multifaceted career: he was a Napoleonic military officer, a French diplomat, and a scholar with a deep interest in war, politics, religion, Freemasonry, and magnetism. As a Freemason of the Enlightenment, he cherished truth and reason, which shaped his skeptical and scientific approach to animal magnetism.

From a young age, de Cuvillers was exposed to mesmeric-like phenomena, including convulsions linked to religious sects like the Convulsionaries of Saint Médard, which bore similarities to magnetic somnambulism. This early exposure influenced his lifelong interest in the natural basis of such phenomena.

The Imaginationist Movement

De Cuvillers was a leading figure of the imaginationist movement, which rejected Mesmer’s theory of magnetic fluid and instead attributed hypnotic phenomena to the imagination. He acknowledged the reality and power of animal magnetism effects but explained them as natural phenomena amplified by imaginative suggestion rather than mysterious forces.

He criticized charlatans who used magnetic practices for deception and personal gain but admired the role imagination plays in healing and psychological processes. His view differed significantly from other magnetists who maintained belief in a magnetic fluid.

His 1820 work, Enlightened Magnetism, set the theoretical foundation for modern hypnosis by exposing frauds and elucidating imagination’s central role in hypnotic phenomena. He called for magnetizers to drop their belief in mystical powers and adopt a rational, imagination-based model of hypnosis (de Cuvillers, 1820).

Hypnosis: Terminology and Theory

De Cuvillers used and disseminated numerous terms based on the Greek root hýpnos, such as hypnologie, hypnotiste, hypnotisme, hypnoscope, hypnology, and hypnomancy (De Cuvillers, 1821, pp. 21-33; 51-52). De Cuvillers stated that the “hypn” terms were not entirely original to him. He referred to listings for some of these terms in earlier French sources, including the 1809 edition of Morin’s Dictionairre Etymologique. the 1814 edition of the Dictionnaire de L’Academie Francaise, and Hanin’s 1811 Vocabulaire Medicale. (De Cuvilers, 1821, p. 46; Gravitz, 1993; Hanin, 1811; L’Academe Francais, 1798; Morin, 1809). However, a careful check of these earlier listings showed that the terms were previously used to refer to disturbed sleep and medication for sleep. The application of hypn-prefix terms to mesmeric phenomena appears to be original to de Cuvillers (1821).

Simon Mialle, the author of a comprehensive two-volume book on animal magnetism, mentioned de Cuvillers’ contribution to the field and described de Cuvillers’ hypn-based nomenclature (Mialle, 1826).

De Cuvillers described mesmeric subjects as demonstrating enhanced concentration, visual imagination, and communication abilities while in trance. This differentiated hypnosis from simple sleepwalking or dreaming. He introduced the term hypnoscopy for the vivid imagination and inner seeing during hypnosis; he contrasted it with oniroscopy (dream seeing).

De Cuvillers emphasized that hypnotic phenomena do not depend on the mesmerizer’s will or a magnetic fluid but on the subject’s imagination and receptivity. He saw hypnosis as a cooperative dynamic, where the subject’s mind plays an active, leading role.

Historical and Cultural Roots of Hypnotic Gesture: The Abéaston

In his 1821 work Animal Magnetism Traced Back in Antiquity, de Cuvillers explored the historical roots of hypnosis-like phenomena and healing rituals involving hand gestures. Central to this was the Abéaston gesture—a hand held open and forward in a protective, calming pose. He identified this gesture in Indian Brahmin rituals (now recognized as the Abhaya Mudrā), ancient Egyptian temple practices, Greek culture, and early Christian healing rites.

This gesture symbolized loss of fear, protection, and immobility, providing a physiological and psychological basis for inducing hypnotic trance. De Cuvillers likened it to predator-prey behavior observed in nature, where stillness and calming postures aid survival.

The Abéaston gesture, he posited, facilitates relaxation and a trance state by promoting trust, comfort, and the suspension of fear. It forms an induction technique that neither requires magnetic fluid nor supernatural forces but relies on natural psychological processes and the contagion of imagination.

Legacy and Significance

Though less known than Mesmer or Braid, de Cuvillers deserves recognition as a key figure in the emergence of modern hypnosis. His appeals to science, imaginative insight, and cultural scholarship grounded hypnosis in naturalistic, psychological phenomena rather than mystical fluids. He helped shift understanding from magnetic to mental processes, paving the way for hypnotic methods used today.

His critiques of animal magnetism, emphasis on the imagination, and linguistic creativity established a rich theoretical framework influencing subsequent hypnotists and hypnotherapists. His interdisciplinary approach, drawing on history, anthropology, physiology, and psychology, remains relevant to understanding hypnosis as a universal human experience shaped by culture and biology.

Key contributions:

• De Cuvillers disseminated several terms based on the “hypn” prefix, two decades before James Braid.
• He rejected magnetic fluid theory and asserted that mesmeric phenomena resulted from the imagination.
• He proposed that the Abéaston gesture, found historically in several cultures and traditions, served as a natural hypnotic-like induction.
• He supported the imaginationist school, inspired by Abbe Faria, that shifted hypnosis toward psychology, suggestion, and mental processes.

IA disclosure: AI was used to assist in accessing and translating French historical documents.

[1] A longer version of this article can be found in a book by Brice LeMaire (2022).

References

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de Cuvillers,E. F. D’H. (1820). Le magnétisme eclairé, Ou introduction aux archives du magnétisme animal. [Enlightened magnetism: An introduction to the Archives of Animal Magnetism.] Chez les Libr. Barrois, Treuttel et Wurtz, Belin-Le Prieur, Bataille et Bosquet Publishers, Paris.

de Cuvillers, E. F. D’H. (1821). Le magnétisme animal retrouvé dans l’antiquité, ou dissertation historique, étymologique et mythologique sur Esculape, Hippocrate et Galien; sur Apis, Sérapis ou Osiris, et sur Isis; suivie de recherches sur l’origine de l’alchimie. [Animal magnetism traced back to antiquity, an historical, etymological, and mythological dissertation on Esculape, Hippocrates, and Galien, as well as Apis, Serapis, and Osiris, followed by research into the origins of alchemy]. Imprimerie de Gueffier Publishers, Paris.

de Faria, J. C. (1819). De la cause du sommeil lucide. [On the cause of lucid sleep]. Chez Mme Horiac Publishers, Paris.

Gravitz, M. A. (1993). Etienne Félix d’Hénin de Cuvillers: A founder of hypnosis. American Journal of Clinical Hynosis, 36(1), 7-11. https://doi.org/10.1080/00029157.1993.10403033

Hanin, J. L. (1811). Vocabulaire médical; ou, Recueil et définition de tous les termes employés en médecine par les auteurs anciens et modernes; suivi d’un dictionnaire biographique des médecins célèbres de tous les temps, avec l’indication des meilleurs ouvrages qu’ils ont publiés, et d’un tableau des signes chimiques. [Medical vocabulary; or, A collection and definition of all terms used in medicine by ancient and modern authors; Followed by a biographical dictionary of famous physicians of all time, Listing the best works they published, and a Table of chemical symbols]. Caille et Ravier, Paris.

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