Lhermitte

Lhermitte is a cited medical authority in Sartre’s analysis of hypnagogic vision, best known here for collecting three cases of vivid apparitions and for an account of their relation to diminished attention to present reality. His contribution gives Sartre clinical material with which to examine how images arise near sleep; Sartre accepts the observations as important while disputing the explanatory framework associated with them.

Role in the Discussion

Lhermitte enters the argument through a distinction about how hypnagogic experience should be described. Sartre rejects the idea that it is simply a stable psychological state: he instead treats it as a temporal form in which successive moments of consciousness are organized differently, developing during the period of falling asleep. The distinction matters because it places the visions within a changing process rather than attributing them to a fixed condition. Lhermitte’s case reports belong to this inquiry into the organization and circumstances of experience at the threshold of sleep.

Sartre says that Lhermitte collected three cases of striking images, which Lhermitte described as waking dreams. Sartre classifies them more specifically as hypnagogic visions. This disagreement is about how to locate the episodes, not whether the apparitions were reported: the cases furnish evidence of images arising in a setting marked by altered attention and disorientation. By reframing them as hypnagogic, Sartre connects the clinical reports to his account of the transition into sleep.

The Reported Case

The example presented in detail concerns a seventy-two-year-old woman who had been suddenly affected by a seizure with upper peduncular syndrome. Her mental functions remained intact, yet she experienced disconcerting apparitions in the evening. As the shadows gathered in the corners of the room where she rested, she saw hens, cats, and birds moving silently across the wooden floor. The animals seemed dreamlike and belonged, in her experience, to a world unlike the ordinary one. She could count them and could have drawn them, details that indicate how definite the visions appeared without establishing them as perceptions of real animals.

The woman remained calm and serene during the apparitions. Although visual and tactile sensations were associated, she did not take them to be genuine perceptions and stayed convinced that she was subject to illusions. The episode therefore differs from an account in which a vision is accepted without reservation as part of the external environment: the reported patient recognized its illusory character even while the images appeared vividly. Sartre’s account preserves both sides of the report—the presence of compelling images and the patient’s maintained distinction between them and genuine perception.

The surrounding circumstances also matter. The woman’s sleep at night was greatly disturbed, and insomnia was associated with a degree of sleepiness in the afternoon. The apparitions occurred as she became uninterested in her surroundings, at a time when the close of day had dulled her visual perceptions. The report thus places the images not in an isolated instant but in a recurring context of disrupted sleep, drowsiness, fading visual acuity, and declining engagement with the present situation.

Attention and Explanation

Sartre presents Lhermitte’s cases as evidence that altered attention is fundamental to hypnagogic consciousness. In the normal approach to sleep, voluntary attention becomes limited; the pathological cases, in Sartre’s reading, show a related lack of interest in what is currently happening. Lhermitte’s conclusion about the three cases emphasizes this withdrawal from the present situation together with a degree of disorientation. The specific woman’s indifference to her immediate surroundings and the broader pattern identified across the cases give that conclusion clinical detail.

Sartre also associates Lhermitte, along with Van Bogart, with a Bergsonian explanation: hallucinatory images arise when the sense of reality and attention to life weaken, allowing images and representations to acquire abnormal clarity. This proposal gives reduced attention an explanatory role, but Sartre argues that it risks treating images and things as inhabitants of two complementary worlds, so that obscurity in one supposedly illuminates the other. He identifies that assumption as an illusion of immanence. He also objects that the explanation may fit the hallucinatory revival of memories but does not adequately account for entirely new images.

Most importantly, Sartre adds a condition that the weakening-of-reality account does not, by itself, capture: the images must not become the object of sustained voluntary attention. He cites Leroy’s observation that a certain absence of voluntary attention is needed both for the phenomenon to emerge and for it to continue. This qualification makes the visions dependent not merely on diminished attention to waking life but also on a distinctive relation to the images themselves. Lhermitte’s reports therefore serve as a point of departure for Sartre’s analysis, while the account of their meaning remains contested.

Significance and Limits

Lhermitte’s importance in this discussion is evidentiary and conceptual rather than biographical. The text supplies no broader account of his life or work; it identifies him through the cases he collected and the interpretation linked to them. Within that limited portrait, his clinical material makes the circumstances of hypnagogic vision concrete: an elderly patient, disturbed nighttime sleep, afternoon sleepiness, gathering evening shadows, dulled sight, silent animal figures, and a persistent awareness that the apparitions were illusions.

Sartre neither dismisses the cases nor simply adopts their associated theory. He uses their pattern of diminished interest and disorientation to support the claim that hypnagogic consciousness involves an alteration of attention, then distinguishes that observation from a theory that explains images as becoming clearer when reality fades. The resulting tension defines Lhermitte’s role in the argument: the cases help establish the phenomenon’s conditions, while their interpretation remains open to philosophical criticism.