A Psychophysical and Steady-State EEG Study of Cross-Modal Integration with Temporal and Spatial Manipulation of Auditory and Tactile Stimulation.
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1
University of Newcastle, School of Psychology, Australia
In order to establish a reliable representation of our natural environment, the human brain must integrate sensory information both within and across separate modalities (Giani et al., 2012). Combining information across modalities, or multisensory integration, may enhance detection of sensory signals within each modality by providing complementary information.
Aims:
The current study aimed to determine the effect of cross-modal correspondence of temporal and spatial physical characteristics for multisensory auditory and vibrotactile stimulation, on psychophysical and steady-state EEG measures of multisensory integration.
Method:
The current study also examined whether cross-modal stimulation to only one side of the body (i.e. unilateral) alters psychophysical and steady-state EEG measures of multisensory integration relative to cross-modal stimulation of both sides of the body (i.e. bilateral).
Results:
The results suggest that correspondence of temporal physical characteristics (e.g. amplitude modulation) for cross-modal stimuli enhances neural responses but potentially disrupts rather than enhances perceptual processing. Moreover, correspondence of spatial characteristics (e.g. side of the body stimulated) does not influence the psychophysical and steady-state EEG measures of multisensory integration. Unilateral and bilateral stimulation were also found to differentially influence both psychophysical and steady-state EEG measures of multisensory integration. A potential inverse relationship between steady-state EEG measures and perceptual sensitivity was also observed.
Keywords:
multisensory integration,
Steady State EEG,
auditory,
vibrotactile,
Temporal and Spatial Processing
Conference:
Australasian Society for Psychophysiology, Inc, Coffs Harbour, Australia, 26 Nov - 28 Nov, 2014.
Presentation Type:
Poster
Topic:
Psychophysiology
Citation:
Budd
TW,
Gillard
EK and
Timora
JR
(2014). A Psychophysical and Steady-State EEG Study of Cross-Modal Integration with Temporal and Spatial Manipulation of Auditory and Tactile Stimulation..
Conference Abstract:
Australasian Society for Psychophysiology, Inc.
doi: 10.3389/conf.fnhum.2014.216.00015
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Received:
28 Oct 2014;
Published Online:
02 Dec 2014.
*
Correspondence:
Dr. Timothy W Budd, University of Newcastle, School of Psychology, Ourimbah, New South Wales, 2258, Australia, bill.budd@newcastle.edu.au