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  The "impaired" internal representation of the body in Parkinson's disease

Barnett-Cowan, M., Dyde, R., Fox, S., Moro, E., Hutchison, W., & Harris, L. (2010). The "impaired" internal representation of the body in Parkinson's disease. Poster presented at 11th International Multisensory Research Forum (IMRF 2010), Liverpool, UK.

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Barnett-Cowan, M1, 2, Author              
Dyde, RT, Author
Fox, SH, Author
Moro, E, Author
Hutchison, WD, Author
Harris, LR, Author
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Perception of the relative orientation of the self, and objects in the environment, requires integration of visual and vestibular sensory information, and an internal representation of the body's orientation. Here I present and discuss findings on the relative contribution of these cues for orientation perception in Parkinson’s disease (PD; Barnett-Cowan et al., Neuroscience, In Press). The orientation of a line relative to vertical (i.e., subjective visual vertical) and the orientation in which a letter character is perceived as the ‘right way up’ (i.e., the perceptual upright) were measured in PD patients (on- and off-medication) and age-matched controls. Visual, vestibular and body cues were manipulated using a polarized visual room presented in various orientations while observers were upright or lying right-side-down. Patients were more influenced by vision than controls but only when setting a line to vertical. Patients relied less on the internal representation of the body when identifying characters as indicated by a greater influence of vestibular information. Consistent with reports of impaired proprioception among medicated PD patients, our effects were significant only when patients were medicated. I will discuss these results within a framework suggesting that this ‘impaired’ internal representation of the body may reflect physiological impairments in PD.

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 Dates: 2010-06
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: 6661
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Title: 11th International Multisensory Research Forum (IMRF 2010)
Place of Event: Liverpool, UK
Start-/End Date: 2010-06-16 - 2010-06-19

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Title: 11th International Multisensory Research Forum (IMRF 2010)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 44 Start / End Page: - Identifier: -