A Parametric Study of Mental Spatial Transformations of Bodies

Zacks, Jeffrey M.; Ollinger, John M.; Sheridan, Margaret A.; Tversky, Barbara

doi:10.1006/nimg.2002.1129

Cited by 129 publications

(119 citation statements)

References 71 publications

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“…While patients with autoscopic hallucinations mostly suffer from brain damage or interference in extrastriate cortex, patients with out-of-body experiences suffer from right hemispheric lesions, especially in temporo-parietal cortex (Blanke et al 2004;Devinsky et al 1989). These phenomenological differences reinforced by recent neuroimaging data showing that faces (i.e., upper bodies) are processed in at least partly distinct brain areas, such as the fusiform and occipital face areas (Kanwisher et al 1997;Puce et al 1998), whereas full bodies are processed in the fusiform and extrastriate body area (Arzy et al 2006(Arzy et al , 2007Downing et al 2001;Zacks et al 1999Zacks et al , 2002. However, further work is needed to clarify this asymmetric pattern of activation for faces, partial bodies, and full bodies.…”

Section: Extrastriate Cortexmentioning

confidence: 98%

“…Activations at the temporo-parietal junction (TPJ) are generally bilateral or have been found mainly in the right or the left hemisphere (Zacks et al 1999). Finally, the majority of the studies that employed stimuli depicting human body parts such as hands or arms reported stronger left parietal activations (Overney and Blanke 2008;Overney et al 2005;de Jong et al 2001;Bonda et al 1995), whereas studies depicting full bodies revealed more bilateral (Zacks et al 1999(Zacks et al , 2002 or right parietal and/or temporo-parietal activations .…”

Section: Introductionmentioning

confidence: 99%

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Mental Imagery for Full and Upper Human Bodies: Common Right Hemisphere Activations and Distinct Extrastriate Activations

et al. 2010

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The processing of human bodies is important in social life and for the recognition of another person's actions, moods, and intentions. Recent neuroimaging studies on mental imagery of human body parts suggest that the left hemisphere is dominant in body processing. However, studies on mental imagery of full human bodies reported stronger right hemisphere or bilateral activations. Here, we measured functional magnetic resonance imaging during mental imagery of bilateral partial (upper) and full bodies. Results show that, independently of whether a full or upper body is processed, the right hemisphere (temporoparietal cortex, anterior parietal cortex, premotor cortex, bilateral superior parietal cortex) is mainly involved in mental imagery of full or partial human bodies. However, distinct activations were found in extrastriate cortex for partial bodies (right fusiform face area) and full bodies (left extrastriate body area). We propose that a common brain network, mainly on the right side, is involved in the mental imagery of human bodies, while two distinct brain areas in extrastriate cortex code for mental imagery of full and upper bodies.

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Section: Extrastriate Cortexmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Mental Imagery for Full and Upper Human Bodies: Common Right Hemisphere Activations and Distinct Extrastriate Activations

et al. 2010

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“…In support of this view, patients presenting out-of-body experiences and heautoscopy have lesions centered on the TPJ including the angular gyrus and the superior temporal gyrus [14,15]. The implication of the TPJ in embodiment is suggested by neuroimaging studies in healthy subjects showing its key role in computing the egocentric reference frame [19,55,117] and in mental imagery/transformation involving one's own-body [16,104,121] as well as employing embodied and disembodied self-location [5]. Furthermore, damage of the TPJ and insula would also account for the disturbances in body ownership reported during out-of-body experience and heautoscopy.…”

Section: Linking Abnormal Body Ownership and Embodiment At The Multismentioning

confidence: 99%

Body ownership and embodiment: Vestibular and multisensory mechanisms

Lopez

Halje

Blanke

2008

Neurophysiologie Clinique/Clinical Neurophysiology

236

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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“…Based on these results, we argued that the temporo-parietal junction might be a crucial structure for the conscious experience of the normal self mediating spatial unity of self and body and egocentric visuospatial perspective, and that impaired processing at the temporo-parietal junction may lead to the experience of abnormal selfs such as OBEs. 46 In summary, although many other cortical areas such as prefrontal cortex, anterior cingulum, postcentral gyrus, precuneus, occipito-temporal junction, insula and superior parietal lobule 30,34,35,40,45,49 have been shown to play a role in self processing, the reviewed neuroimaging data on body and self processing as well as our data on OBEs suggest that the temporo-parietal junction is a key neural locus for self processing that is involved in multisensory body-related information processing as well as in processing of phenomenological and cognitive aspects of the self. Interestingly, the above-mentioned studies show that techniques that have been used voluntarily to induce OBEs and the phenomenology of OBE may be combined with classical neuropsychological paradigms of mental imagery and neuroimaging methods to examine the neural correlates of OBEs and the self.…”

Section: Neurocognitive Mechanisms Of Obesmentioning

confidence: 99%