BIROn - Birkbeck Institutional Research Online

    Structural representations of fingers rely on both anatomical and spatial reference frames

    Dolgilevica, K. and Longo, Matthew and Tame, Luigi (2019) Structural representations of fingers rely on both anatomical and spatial reference frames. Journal of Experimental Psychology: Human Perception and Performance , ISSN 0096-1523. (In Press)

    [img]
    Preview
    Text
    29608.pdf - Author's Accepted Manuscript

    Download (283kB) | Preview

    Abstract

    Finger agnosia refers to a neurological condition in which patients with left posterior parietal lesions fail to identify their fingers, despite having relatively preserved abilities in sensation and skilled action. This dissociation suggests that the structural body representations (BSRs) may be distinct from sensorimotor representations. However, recent research has reported that postural changes modulate representation of hand structure, revealing dynamic interactions between structural and sensorimotor body representations. However, it is unknown how and to what extent anatomical and spatial proximity contribute to shape the hand structural representation. We investigate this question using the “in-between” test in which participants estimate how many unstimulated fingers are in-between two touched fingers of the left hand placed palm down. The first phalange of the participants’ fingers was touched on the left or right side. Judged finger numerosity was greater when fingers were stimulated on far sides (i.e., opposite sides of the two fingers) compared to when they were stimulated on close (i.e., sides facing each other’s) or mid-distance (i.e., sides facing in the same direction) sides. Therefore, fingers identification was modulated both by anatomical and spatial proximity in external space between touches. This demonstrates that BSRs rely on both anatomical and external reference frames.

    Metadata

    Item Type: Article
    Additional Information: ©American Psychological Association 201x. This paper is not the copy of record and may not exactly replicate the authoritative document published in the APA journal. Please do not copy or cite without author's permission. The final article is available, upon publication, at the DOI cited above.
    School: Birkbeck Schools and Departments > School of Science > Psychological Sciences
    Depositing User: Matthew Longo
    Date Deposited: 23 Oct 2019 16:58
    Last Modified: 25 Oct 2019 17:15
    URI: http://eprints.bbk.ac.uk/id/eprint/29608

    Statistics

    Downloads
    Activity Overview
    51Downloads
    39Hits

    Additional statistics are available via IRStats2.

    Archive Staff Only (login required)

    Edit/View Item Edit/View Item