Abstract：
:Research has suggested that altering the perceived shape and size of the body image significantly affects perception of somatic events. The current study investigated how multisensory illusions applied to the body altered tactile perception using the somatic signal detection task. Thirty-one healthy volunteers were asked to report the presence or absence of near-threshold tactile stimuli delivered to the index finger under three multisensory illusion conditions: stretched finger, shrunken finger and detached finger, as well as a veridical baseline condition. Both stretching and shrinking the stimulated finger enhanced correct touch detections; however, the mechanisms underlying this increase were found to be different. In contrast, the detached appearance reduced false touch reports-possibly due to reduced tactile noise, as a result of attention being directed to the tip of the finger only. These findings suggest that distorted representations of the body could have different modulatory effects on attention to touch and provide a link between perceived body representation and somatosensory decision-making.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Treshi-marie Perera A,Newport R,McKenzie KJdoi
10.1007/s00221-015-4384-8subject
Has Abstractpub_date
2015-11-01 00:00:00pages
3153-61issue
11eissn
0014-4819issn
1432-1106pii
10.1007/s00221-015-4384-8journal_volume
233pub_type
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