A threat to a virtual hand elicits motor cortex activation

We report an experiment where participants observed an attack on their virtual body as experienced in an immersive virtual reality (IVR) system. Participants sat by a table with their right hand resting upon it. In IVR, they saw a virtual table that was registered with the real one, and they had a v...

Celý popis

Uloženo v:

Podrobná bibliografie
Vydáno v:	Experimental brain research Ročník 232; číslo 3; s. 875 - 887
Hlavní autoři:	González-Franco, Mar, Peck, Tabitha C., Rodríguez-Fornells, Antoni, Slater, Mel
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2014 Springer Springer Nature B.V
Témata:	Adult Analysis Biological and medical sciences Biomedical and Life Sciences Biomedicine Brain Brain mapping Brain research Cognitive ability Cortex Electroencephalography Electromyography Event-related potentials Evoked Potentials, Motor - physiology Experiments Fear - psychology Female Fundamental and applied biological sciences. Psychology Hand - physiology Hands Human body Humans Male Motor cortex Motor Cortex - physiology Movement - physiology Neurology Neurosciences Ownership Pain Photic Stimulation Realism Research Article Resting Rhythm Spectrum Analysis Statistics, Nonparametric Subjectivity Surveys and Questionnaires Threat (Psychology) User-Computer Interface Vertebrates: nervous system and sense organs Virtual reality Young Adult Spain ERPs Rubber hand illusion Pain Body ownership Motor cortex Virtual reality Motor pathway Central nervous system Hand Encephalon
ISSN:	0014-4819, 1432-1106, 1432-1106
On-line přístup:	Získat plný text
Tagy:	Přidat tag Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!

Popis
Shrnutí:	We report an experiment where participants observed an attack on their virtual body as experienced in an immersive virtual reality (IVR) system. Participants sat by a table with their right hand resting upon it. In IVR, they saw a virtual table that was registered with the real one, and they had a virtual body that substituted their real body seen from a first person perspective. The virtual right hand was collocated with their real right hand. Event-related brain potentials were recorded in two conditions, one where the participant’s virtual hand was attacked with a knife and a control condition where the knife only struck the virtual table. Significantly greater P450 potentials were obtained in the attack condition confirming our expectations that participants had a strong illusion of the virtual hand being their own, which was also strongly supported by questionnaire responses. Higher levels of subjective virtual hand ownership correlated with larger P450 amplitudes. Mu-rhythm event-related desynchronization in the motor cortex and readiness potential (C3–C4) negativity were clearly observed when the virtual hand was threatened—as would be expected, if the real hand was threatened and the participant tried to avoid harm. Our results support the idea that event-related potentials may provide a promising non-subjective measure of virtual embodiment. They also support previous experiments on pain observation and are placed into context of similar experiments and studies of body perception and body ownership within cognitive neuroscience.
Bibliografie:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-1 ObjectType-Feature-2 content type line 23
ISSN:	0014-4819 1432-1106 1432-1106
DOI:	10.1007/s00221-013-3800-1