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Object Selectivity of Local Field Potentials and Spikes in the Macaque Inferior Temporal Cortex

Kreiman, Gabriel and Hung, Chou P and Kraskov, Alexander and Quiroga, Rodrigo and Poggio, Tomaso and DiCarlo, James J. (2006) Object Selectivity of Local Field Potentials and Spikes in the Macaque Inferior Temporal Cortex. Neuron, 49 (3). pp. 433-445. ISSN 0896-6273. doi:10.1016/j.neuron.2005.12.019.

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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 ∼3 mm. A comparison of separate sites suggests that selectivity is similar on a scale of ∼800 μm for spikes and ∼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.

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Additional Information: Received 14 June 2005; Revised 8 September 2005; Accepted 15 December 2005; Available online 3 February 2006; Published: February 1, 2006. We would like to thank Alec Shkolnik for initial help with the analysis; Nancy Kanwisher, Christof Koch, John Maunsell, Tony Movshon, and Peter Schiller for comments on the manuscript and helpful discussion; and CSBi for computer cluster usage. We also thank J. Patrick Mayo and Jennifer Deutsch for animal husbandry and technical support. This research was sponsored by The Defense Advanced Research Projects Agency, The Office of Naval Research (DARPA/ONR N00014-02-1-0915), NIH, and a Whiteman Fellowship to G.K.
Group:Koch Laboratory (KLAB)
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Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Office of Naval ResearchDARPA/ONR N00014-02-1-0915
Whiteman FellowshipUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20130816-103211924
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Official Citation:Gabriel Kreiman, Chou P. Hung, Alexander Kraskov, Rodrigo Quian Quiroga, Tomaso Poggio, James J. DiCarlo, Object Selectivity of Local Field Potentials and Spikes in the Macaque Inferior Temporal Cortex, Neuron, Volume 49, Issue 3, 2 February 2006, Pages 433-445, ISSN 0896-6273, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40461
Deposited By: KLAB Import
Deposited On:12 Jan 2008 01:58
Last Modified:09 Nov 2021 23:49

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