Inverted Vision After Frontal Lobe Disease

Solms, Mark; Kaplan-Solms, Karen; Saling, Michael M.; Miller, Percy

doi:10.1016/s0010-9452(88)80044-3

Cited by 95 publications

(51 citation statements)

References 13 publications

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“…However, a contribution of the parieto-occipital and frontal cortex has also been suggested [108]. We assume the implication of the PIVC in the room tilt illusion to be distinct from its implication in out-ofbody experiences and heautoscopy as during the room tilt illusion there is only abnormal processing with respect to body location in extrapersonal space without pathologies of embodiment and body ownership.…”

Section: Linking Abnormal Body Ownership and Embodiment At The Multismentioning

confidence: 87%

“…The room tilt illusion is a paroxysmal and transient tilt of the entire visual surrounding without mislocalization of one's own body [25,108,113]. Typically, subjects report a sudden upside-down reversal (180 • inversion of the visual field) or a 90 • tilt of the extrapersonal world with respect to their body ( Fig.…”

Section: Room Tilt Illusionmentioning

confidence: 99%

“…The room tilt illusion may last from several seconds to hours. In most cases, inversion or tilt occurs in the frontal plane, but both have also been described in the horizontal and sagittal planes [108,113]. Room tilt illusion has been associated with lesion of the brainstem and vestibulocerebellar system [34,41,71,103,109,111,113], lesions of the parieto-occipital and frontal cortex (see review in [108]), peripheral vestibular disorders [89], and it has even been described in healthy subjects [89,101].…”

Section: Room Tilt Illusionmentioning

confidence: 99%

“…See text for explanations (drawings by Lovisa Halje after Blanke et al [14]). respect to their body (and self), called room tilt illusion [34,108,113]. Third, we review conditions of vestibular and multisensory conflicts that are prone to induce body illusions in healthy subjects including astronauts.…”

Section: Introductionmentioning

confidence: 99%

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Body ownership and embodiment: Vestibular and multisensory mechanisms

Lopez

Halje

Blanke

2008

Neurophysiologie Clinique/Clinical Neurophysiology

230

163

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Summary Body ownership and embodiment are two fundamental mechanisms of selfconsciousness. The present article reviews neurological data about paroxysmal illusions during which body ownership and embodiment are affected differentially: autoscopic phenomena (out-of-body experience, heautoscopy, autoscopic hallucination, feeling-of-a-presence) and the room tilt illusion. We suggest that autoscopic phenomena and room tilt illusion are related to different types of failures to integrate body-related information (vestibular, proprioceptive and tactile cues) in addition to a mismatch between vestibular and visual references. In these patients, altered body ownership and embodiment has been shown to occur due to pathological activity at the temporoparietal junction and other vestibular-related areas arguing for a key importance of vestibular processing. We also review the possibilities of manipulating body ownership and embodiment in healthy subjects through exposition to weightlessness as well as caloric and galvanic stimulation of the peripheral vestibular apparatus. In healthy subjects, disturbed self-processing might be related to interference of vestibular stimulation with vestibular cortex leading to disintegration of bodily information and altered body ownership and embodiment. We finally propose a differential contribution of the vestibular cortical areas to the different forms of altered body ownership and embodiment. Résumé L'attribution du corps propre et de ses éléments constitutifs (body ownership), ainsi que le sentiment d'incarnation (embodiment) -le fait d'habiter ce corps, d'être localisé dans les limites physiques de ce corps -, sont deux éléments fondamentaux de la conscience de soi. Nous faisons ici la synthèse de données issues de la neurologie montrant que des manifestations paroxystiques telles que les phénomènes autoscopiques (expérience de sortie du corps, héautoscopie, hallucination autoscopique, sensation de présence) et l'illusion de bascule de l'environnement (room tilt illusion) se caractérisent par une atteinte différentielle des mécanismes d'attribution du corps propre et du sentiment d'incarnation. Nous faisons l'hypothèse que les différents phénomènes autoscopiques et l'illusion de bascule de l'environnement se caractérisent par différents patrons de déficits d'intégration des informations sensorielles corporelles (informations visuelles, musculaires proprioceptives et tactiles) combinés à une perte de cohérence entre les références visuelles et vestibulaires. Chez les patients souffrant de phénomènes autoscopiques, les déficits d'attribution du corps propre et du sentiment d'incarnation ont été liés à un dysfonctionnement au niveau de la jonction temporopariétale et d'autres régions corticales recevant des informations vestibulaires, suggérant une contribution importante des afférences vestibulaires dans les mécanismes de la conscience de soi. Nous rapportons également des données de la littérature recueillies chez des sujets sains suggérant la possibilité de manipuler l'attribution ...

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Section: Linking Abnormal Body Ownership and Embodiment At The Multismentioning

confidence: 87%

Section: Room Tilt Illusionmentioning

confidence: 99%

Section: Room Tilt Illusionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Body ownership and embodiment: Vestibular and multisensory mechanisms

Lopez

Halje

Blanke

2008

Neurophysiologie Clinique/Clinical Neurophysiology

230

163

View full text Add to dashboard Cite

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“…These difficulties include dealing with object changes both in the picture plane [13,24,47,54,55] and in the depth plane [38,55,63]. However, right parietal brain-damage does not invariably lead to impairments in dealing with both types of orientation change [12,54,55].…”

Section: Introductionmentioning

confidence: 99%

A particular difficulty in discriminating between mirror images

Davidoff

Warrington

2001

Neuropsychologia

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We investigated the selective impairment of mirror image discrimination in a patient with bilateral parieto-occipital lesions (FIM). We report a difficulty with the discrimination between mirror images more selective than has been previously reported (Turnbull OH, McCarthy RA. Failure to discriminate between mirror-image objects: a case of viewpoint-independent object recognition? Neurocase 1996;2:63). FIM was asked to judge, in five same/different experiments, whether pairs of simultaneously presented line drawings of objects were identical. FIM demonstrated only a minor impairment in discriminating between orientations in the picture plane but was at chance in making discrimination between mirror images. An experiment with normal observers established that our results were not due to differences in task difficulty. Two further experiments investigated the effects of rotation on the discrimination of letters and geometric shapes. FIM's impairment extended to geometric shapes but not to letters. These results would be consistent with the preservation of an abstract representation for object recognition that did not code the difference between mirror image views.

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