Neural correlates of two imagined egocentric transformations

Creem-Regehr, Sarah H.; Neil, Jayson A.; Yeh, Hsiang J.

doi:10.1016/j.neuroimage.2006.11.057

Cited by 76 publications

(62 citation statements)

References 42 publications

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“…Whereas previous studies have highlighted the role of integrating motor signals and proprioceptive information (Amorim et al, 2006;Creem-Regehr, Neil, & Yeh, 2007;Keehner, Guerin, Miller, Turk, & Hegarty, 2006;Kessler & Thomson, 2010;Parsons, 1987;Vogeley et al, 2004;Wraga, 2003;Zacks & Michelon, 2005), this study underlines the central importance of vestibular information for embodied perspective taking. These signals may be of particular importance for mental imagery with respect to one's entire body as opposed to imagery for body parts (Parsons, 1987) where motor and proprioceptive mechanisms may predominate.…”

Section: Discussioncontrasting

confidence: 72%

Imagined own-body transformations during passive self-motion

Elk

Blanke

2013

Psychological Research

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Spatial perspective taking is a crucial social skill that underlies many of our everyday interactions. Previous studies have suggested that spatial perspective taking is an embodied process that involves the integration of both motor and proprioceptive information. Given the importance of vestibular signals for own-body perception, mental own-body imagery, and bodily self-consciousness, in the present study we hypothesized that vestibular stimulation due to passive own-body displacements should also modulate spatial perspective taking. Participants performed an own-body transformation task while being passively rotated in a clockwise or counter-clockwise direction on a human motion platform. A congruency effect was observed, reflected in faster reaction times if the implied mental body rotation direction matched the actual rotation direction of the chair. These findings indicate that vestibular stimulation modulates and facilitates mental perspective taking, thereby highlighting the importance of integrating multisensory bodily information for spatial perspective taking.

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Section: Discussioncontrasting

confidence: 72%

Imagined own-body transformations during passive self-motion

Elk

Blanke

2013

Psychological Research

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“…We also replicated the finding that performance for the OBT-task was superior to the one for the Mirror-task (faster responding, higher accuracy) (Arzy et al, 2006), indicating that mental imagery employing disembodied self-location and perspective (potentially relating to an extrinsic egocentric coordinate system) is easier to perform than mental imagery employing embodied self-location and perspective (potentially relating to an intrinsic egocentric coordinate system (see e.g., Buxbaum et al, 2000;Shenton et al, 2004)). These overall findings would also indicate that behavioural differences are not altered, at least in the present experimental condition, by whether participants performed SwT or RepT [see Creem-Regehr et al (2007) for a related behavioural finding when using a blockdesign or an intermixed-design when assessing two egocentric transformation tasks].…”

Section: Discussionmentioning

confidence: 63%

A putative implication for fronto-parietal connectivity in out-of-body experiences

Easton

Blanke

Möhr

2009

Cortex

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AutoscopyParanormal experience a b s t r a c t Self-processing has been related to the prefrontal cortex (PFC) and the temporo-parietal junction (TPJ) as well as to their connectivity. So far, out-of-body experiences (OBEs), impressive transient deviations of intact bodily self-integration, could be associated with the TPJ, but the mediation by the frontal lobe, and thus fronto-parietal connectivity, is yet unknown. Thus, we assessed switching performance to assess fronto-parietal connectivity when healthy participants [11 reported previous OBEs (OBE-individuals); 36 reported no previous OBEs (nOBE-individuals)] performed two different mental own body imagery tasks. By using the same stimuli of a front-facing and back-facing human figure, a cue simultaneously presented with the target indicated to participants whether they had to take the position of the depicted human figure (disembodied self-location mimicking an OBE) or had to imagine that the figure was their own reflection in a mirror (embodied Selflocation). By repeating trials of the same task instruction for a differing number of trials (2-6 trials), we could assess switch costs when alternating between these two task instructions with switch costs being considered to be a behavioural indicator of frontoparietal connectivity. Results showed that OBE-individuals performed worse than nOBEindividuals in switch trials, but not in trials in which the same task instruction was repeated. Moreover, this reduced performance was specific to body positions that are normally considered easier (front-facing in the mirror condition; back-facing in the OBE mimicking condition). These findings suggest that a fronto-parietal network might be implicated in OBEs, and that the flexible and spontaneous egocentric perspective taking of self-congruent body representations is hampered in individuals with previous OBEs. ª 2008 Elsevier Srl. All rights reserved. IntroductionIntact self representation relies on the ability to experience oneself as an enduring and spatial entity (i.e., the feeling that we are the same person across time and space) to which certain mental events and actions are ascribed (i.e., the feeling of agency; being author of one's own thoughts and actions) and which is distinct from the environment (e.g., Blanke et al., 2005;Brugger et al., 1997;Frith, 2005;Halligan, 2002;Kircher and David, 2003;Ramachandran and Hirstein, 1998 for recent accounts). More recent philosophical and neurological theories have also highlighted the relevance of the bodily self, i.e., * Corresponding author. Department of Experimental Psychology, University of Bristol, 12a Priory Road, Bristol BS8 1TU, UK. E-mail address: christine.mohr@bristol.ac.uk (C. Mohr).a v a i l a b l e a t w w w . s c i e n c e d i r e c t . c o m j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / c o r t e x 0010-9452/$ -see front matter ª

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“…However, the effect complete vestibular loss can have on other brain areas is less understood, and the involvement of yet other brain areas is likely for the types of tasks we used. For example, neuroimaging and clinical studies have shown that different areas such as the temporo-parietal junction and the inferior and the superior parietal cortex are involved in EMT tasks (Zacks et al 1999;Blanke et al 2005;Creem-Regehr et al 2007). Interestingly, these areas are also found to receive vestibular input (e.g., Lobel et al 1999;Bense et al 2001;de Waele et al 2001;Dieterich et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Mental transformation abilities in patients with unilateral and bilateral vestibular loss

et al. 2011

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Vestibular information helps to establish a reliable gravitational frame of reference and contributes to the adequate perception of the location of one's own body in space. This information is likely to be required in spatial cognitive tasks. Indeed, previous studies suggest that the processing of vestibular information is involved in mental transformation tasks in healthy participants. In this study, we investigate whether patients with bilateral or unilateral vestibular loss show impaired ability to mentally transform images of bodies and body parts compared to a healthy, age-matched control group. An egocentric and an objectbased mental transformation task were used. Moreover, spatial perception was assessed using a computerized version of the subjective visual vertical and the rod and frame test. Participants with bilateral vestibular loss showed impaired performance in mental transformation, especially in egocentric mental transformation, compared to participants with unilateral vestibular lesions and the control group. Performance of participants with unilateral vestibular lesions and the control group are comparable, and no differences were found between right-and left-sided labyrinthectomized patients. A control task showed no differences between the three groups. The findings from this study substantiate that central vestibular processes are involved in imagined spatial body transformations; but interestingly, only participants with bilateral vestibular loss are affected, whereas unilateral vestibular loss does not lead to a decline in spatial imagery.

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Neural correlates of two imagined egocentric transformations

Cited by 76 publications

References 42 publications

Imagined own-body transformations during passive self-motion

Imagined own-body transformations during passive self-motion

A putative implication for fronto-parietal connectivity in out-of-body experiences

Mental transformation abilities in patients with unilateral and bilateral vestibular loss

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