youssef-deepbrainstimulation-2018.pdf (1.45 MB)
Deep brain stimulation for Parkinson's disease changes perception in the Rubber Hand Illusion
journal contribution
posted on 2018-09-14, 00:00 authored by Catherine Ding, Colin J Palmer, Jakob Hohwy, George YoussefGeorge Youssef, Bryan Paton, Naotsugu Tsuchiya, Julie C Stout, Dominic ThyagarajanParkinson's disease (PD) alters cortico-basal ganglia-thalamic circuitry and susceptibility to an illusion of bodily awareness, the Rubber Hand Illusion (RHI). Bodily awareness is thought to result from multisensory integration in a predominantly cortical network; the role of subcortical connections is unknown. We studied the effect of modulating cortico-subcortical circuitry on multisensory integration for bodily awareness in 24 PD patients treated with subthalamic nucleus (STN) deep brain stimulation (DBS), in comparison to 21 healthy volunteers, using the RHI experiment. Typically, synchronous visuo-tactile cues induce a false perception of touch on the rubber hand as if it were the subject's hand, whereas asynchronous visuo-tactile cues do not. However, we found that in the asynchronous condition, patients in the off-stimulation state did not reject the RHI as strongly as healthy controls; patients' rejection of the RHI strengthened when STN-DBS was switched on, although it remained weaker than that of controls. Patients in the off-stimulation state also misjudged the position of their hand, indicating it to be closer to the rubber hand than controls. However, STN-DBS did not affect proprioceptive judgements or subsequent arm movements altered by the perceptual effects of the illusion. Our findings support the idea that the STN and subcortical connections have a key role in multisensory integration for bodily awareness. Decision-making in multisensory bodily illusions is discussed.
History
Journal
Scientific reportsVolume
8Article number
13842Pagination
1 - 10Publisher
Nature Publishing GroupLocation
London, Eng.Publisher DOI
Link to full text
eISSN
2045-2322Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, The AuthorsUsage metrics
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No categories selectedKeywords
Parkinson’s disease (PD)cortico-basal ganglia-thalamic circuitrybodily awarenessRubber Hand Illusion (RHI)multisensory integrationcortical networksubcortical connectionssubthalamic nucleus (STN)deep brain stimulation (DBS)Science & TechnologyMultidisciplinary SciencesScience & Technology - Other TopicsSUBTHALAMIC NUCLEUSOLFACTORY FUNCTIONOWNERSHIPMOVEMENTTARGETSTHATS
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