Percepts about our body’s position in space and about body ownership are informed by multisensory feedback from visual, proprioceptive, and tactile inputs. The Rubber Hand Illusion (RHI) is a multisensory illusion that is induced when an observer sees a rubber hand being stroked while they feel their own, spatially displaced, and obstructed hand being stroked. When temporally synchronous, the visual–tactile interactions can create the illusion that the rubber hand belongs to the observer and that the observer’s real hand is shifted in position towards the rubber hand. Importantly, little is understood about whether these multisensory perceptions of the body change with older age. Thus, in this study we implemented a classic RHI protocol (synchronous versus asynchronous stroking) with healthy younger (18–35) and older (65+) adults and measured the magnitude of proprioceptive drift and the subjective experience of body ownership. As an adjunctive objective measure, skin temperature was recorded to evaluate whether decreases in skin temperature were associated with illusory percepts, as has been shown previously. The RHI was observed for both age groups with respect to increased drift and higher ratings of ownership following synchronous compared to asynchronous stroking. Importantly, no effects of age and no interactions between age and condition were observed for either of these outcome measures. No effects were observed for skin temperature. Overall, these results contribute to an emerging field of research investigating the conditions under which age-related differences in multisensory integration are observed by providing insights into the role of visual, proprioceptive, and tactile inputs on bodily percepts.
Are movements necessary for the sense of body ownership? Evidence from the rubber hand illusion in pure hemiplegic patientsPloS One10e0117155. DOI:10.1371/journal.pone.0117155.
CowieD.SterlingS.BremnerA. J. (2016).
The development of multisensory body representation and awareness continues to 10 years of age: evidence from the rubber hand illusionJ. Exp. Child Psychol.142230–238.
Explaining away the body: experiences of supernaturally caused touch and touch on non-hand objects within the rubber hand illusionPLoS One5(2) e9416. DOI:10.1371/journal.pone.0009416.
Psychologically induced cooling of a specific body part caused by the illusory ownership of an artificial counterpartProc. Natl Acad. Sci. USA10513168–13172.
MozolicJ. L.HugenschmidtC. E.PeifferA. M.LaurientiP. J. (2012).
Multisensory integration and aging in:
The Neural Bases of Multisensory ProcessesMurrayM. M.WallaceM. T. (Eds) pp.
81–392. CRC PressBoca Raton, FL, USA.
RohdeM.WoldA.KarnathH.-O.ErnstM. O. (2013).
The human touch: skin temperature during the rubber hand illusion in manual and automated stroking proceduresPLoS One8e80688. DOI:10.1371/journal.pone.0080688.
SettiA.FinniganS.SobolewskiR.McLarenL.RobertsonI.ReillyR. B.KennyR. A.NewellF. N. (2011a).
Audiovisual temporal discrimination is less efficient with aging: an event-related potential studyNeuroReport22554–558.