Receptive fields in human visual cortex mapped with surface electrodes

Daniel Yoshor, William H. Bosking, Geoffrey M. Ghose, John H.R. Maunsell

    Research output: Contribution to journalArticle

    95 Scopus citations

    Abstract

    Most of our understanding of the functional organization of human visual cortex comes from lesion and functional imaging studies and by extrapolation from results obtained by neuroanatomical and neurophysiological studies in nonhuman primates. Although some single-unit and field potential recordings have been made in human visual cortex, none has provided quantitative characterization of spatial receptive fields (RFs) of individual sites. Here we use subdural electrodes implanted for clinical purposes to quantitatively measure response properties in different regions of human visual cortex. We find significant differences in RF size, response latency, and response magnitude for sites in early visual areas, versus sites in later stages of both the dorsal and ventral streams. In addition, we use this technique to estimate the cortical magnification factor in early human visual cortex. The spatial and temporal resolution of cortical surface recordings suggest that this technique is well suited to examine further issues in visual processing in humans.

    Original languageEnglish (US)
    Pages (from-to)2293-2302
    Number of pages10
    JournalCerebral Cortex
    Volume17
    Issue number10
    DOIs
    StatePublished - Oct 1 2007

    Keywords

    • Electrophysiology
    • Human
    • Latency
    • Magnification factor
    • Retinotopy

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