Object selectivity of local field potentials and spikes in the macaque inferior temporal cortex

TitleObject selectivity of local field potentials and spikes in the macaque inferior temporal cortex
Publication TypeJournal Article
Year of Publication2006
AuthorsKreiman G, Hung CP, Kraskov A, Quiroga RQ, Poggio T, DiCarlo JJ
JournalNeuron
Volume49
Pagination433–445
Date Publishedfeb
ISSN0896-6273
KeywordsAction Potentials, Animals, Brain Mapping, Electroencephalography, Evoked Potentials, Macaca, Models, Neurological, Pattern Recognition, Photic Stimulation, Temporal Lobe, Visual, Visual Fields, Visual Pathways
Abstract

Local field potentials {(LFPs)} arise largely from dendritic activity over large brain regions and thus provide a measure of the input to and local processing within an area. We characterized {LFPs} and their relationship to spikes (multi and single unit) in monkey inferior temporal cortex {(IT).} {LFP} responses in {IT} to complex objects showed strong selectivity at 44% of the sites and tolerance to retinal position and size. The {LFP} preferences were poorly predicted by the spike preferences at the same site but were better explained by averaging spikes within approximately 3 mm. A comparison of separate sites suggests that selectivity is similar on a scale of approximately 800 microm for spikes and approximately 5 mm for {LFPs.} These observations imply that inputs to {IT} neurons convey selectivity for complex shapes and that such input may have an underlying organization spanning several millimeters.

URLhttp://dicarlolab.mit.edu/sites/dicarlolab.mit.edu/files/pubs/kreiman%20et%20al%202006.pdf
DOI10.1016/j.neuron.2005.12.019
Refereed DesignationRefereed

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