[1][2] An obituary published in the Journal of Nervous and Mental Disease describes her as having "qualities of intense application and of intelligence.
[3] During her career, Lévy focused on two main areas of research: encephalitis lethargica, and the Roussy–Lévy syndrome, which was named for her.
[3] Though she is rarely cited as first-author in the publications to which she contributed, Roussy credited her with many of the initial ideas for projects, and a great part of their execution, describing her role in the research as "dominant".
[3] Lévy's first article was a collaboration with Pierre Marie describing 10 cases of movement disorders associated with encephalitis lethargica.
According to her obituary, "her contributions to rare syndromes of this disorder have been of the highest order," and her thesis in particular "gave her a commanding place in the neuropsychiatric world.
"[2] In 1926, in collaboration with her colleague Roussy, she published an article describing seven patients with hereditary areflexive dystasia, which then became known as Roussy-Lévy syndrome.
[1] In the obituary written by Gustave Roussy, he explains that "circumstances made her work, research and the exercise of her profession her raison d'être".
[3] He further praises the numerous qualities she possessed: "In all her work, we find the mark of her personality: the method in the rigorous observation of the facts, the determination to pursue the analysis and the repeated verification of a sign or a lesion that may have seemed unusual or new to her, the curiosity to go back to the origins of this sign in order to find its logical and rational explanation, the patience to frequently compare what she saw with what others had noted before her, finally the taste to debate - as she liked to call them - with her contradictors, the validity of her assertions, and in this dialectic in which she excelled, she was served by a great memory and a perfect knowledge of foreign languages.