Distinct spatial scale sensitivities for early categorization of faces and places: neuromagnetic and behavioral findings

Bhuvanesh Awasthi*, Paul F. Sowman, Jason Friedman, Mark A. Williams

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)
    17 Downloads (Pure)

    Abstract

    Research exploring the role of spatial frequencies in rapid stimulus detection and categorisation report flexible reliance on specific spatial frequency bands. Here, through a set of behavioural and magnetoencephalography (MEG) experiments, we investigated the role of low spatial frequency (LSF)(<8 cycles/face) and high spatial frequency (HSF)(>25 cycles/face) information during the categorisation of faces and places. Reaction time measures revealed significantly faster categorisation of faces driven by LSF information, while rapid categorisation of places was facilitated by HSF information. The MEG study showed significantly earlier latency of the M170 component for LSF faces compared to HSF faces. Moreover, the M170 amplitude was larger for LSF faces than for LSF places, whereas the reverse pattern was evident for HSF faces and places. These results suggest that spatial frequency modulates the processing of category specific information for faces and places.

    Original languageEnglish
    Article number91
    Pages (from-to)1-11
    Number of pages11
    JournalFrontiers in Human Neuroscience
    Volume7
    DOIs
    Publication statusPublished - 4 Mar 2013

    Bibliographical note

    Copyright the Author/s. This Document is protected by copyright and was first published by Frontiers. All rights reserved. It is reproduced with permission.

    Keywords

    • Face perception
    • M170
    • Place perception
    • Spatial frequency

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