Topography and homogeneity of monkey V1 studied through subdurally recorded pattern-evoked potentials

Visual Neuroscience
G DagnelieB van Dijk

Abstract

Using small checkerboard stimulus fields, we have recorded visually evoked potentials (VEPs) in an alert rhesus monkey from an array of 35 electrodes chronically implanted between dura and arachnoid to study mass neuronal activity in striate and peristriate visual cortex. Although the principal purpose of this work was to study in detail cortical mapping in this particular animal for future intracortical recordings, we report here the usefulness of our approach for the non-invasive study of cortical processing, in particular of cortical magnification and receptive-field properties over the central 6 degrees of the visual field. The striate and extrastriate components in the pattern onset VEP both have a double negative-going waveform, with N-P-N peak latencies of 75-100-135 ms and 90-115-160 ms, respectively, for small element sizes and moderate contrasts; latencies may be 5 ms shorter for large element sizes and high contrast. We found little activity at electrode locations over visual areas beyond V2. The waveforms and timing permit some careful speculation concerning intracortical processing and VEP generation. The complex logarithmic form of the retinotopical projection provides a satisfactory model for our data, if a value...Continue Reading

References

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Citations

May 31, 1991·Brain Research·P C VijnH Spekreijse
Jan 1, 1994·Electroencephalography and Clinical Neurophysiology·H A BaselerT Carney
Mar 1, 1994·Vision Research·V A LammeH Spekreijse
Jan 1, 1995·The International Journal of Neuroscience·V L TowleL Parmeggiani
Sep 17, 2004·Journal of Neurophysiology·E J TehovnikP H Schiller
May 10, 2016·PloS One·Tomislav Milekovic, Carsten Mehring
Jun 10, 1993·Nature·V A LammeH Spekreijse
Dec 19, 2006·Cerebral Cortex·Daniel YoshorJohn H R Maunsell
Jun 15, 2007·Journal of Neurophysiology·Edward J Tehovnik, Warren M Slocum
Sep 1, 1993·Visual Neuroscience·V A LammeH Spekereijse
Sep 7, 2021·The European Journal of Neuroscience·Alice Mado ProverbioAlberto Zani

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