Linked Life Data

20696254

Source:http://linkedlifedata.com/resource/pubmed/id/20696254

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pubmed-article:20696254pubmed:abstractTextElectrocorticogram (ECoG) is a well-balanced methodology for stably mapping brain surface local field potentials (LFPs) over a wide cortical region with high signal fidelity and minimal invasiveness to the brain tissue. To directly compare surface ECoG signals with intracortical neuronal activity immediately underneath, we fabricated a flexible multichannel electrode array with mesh-form structure using micro-electro-mechanical systems. A Parylene-C-based "electrode-mesh" for rats contained a 6×6 gold electrode array with 1-mm interval. Specifically, the probe had 800×800 ?m(2) fenestrae in interelectrode spaces, through which simultaneous penetration of microelectrode was capable. This electrode-mesh was placed acutely or chronically on the dural/pial surface of the visual cortex of Long-Evans rats for up to 2 weeks. We obtained reliable trial-wise profiles of visually evoked ECoG signals through individual eye stimulation. Visually evoked ECoG signals from the electrode-mesh exhibited as well or larger signal amplitudes as intracortical LFPs and less across-trial variability than conventional silver-ball ECoG. Ocular selectivity of ECoG responses was correlated with that of intracortical spike/LFP activities. Moreover, single-trial ECoG signals carried sufficient information for predicting the stimulated eye with a correct performance approaching 90%, and the decoding was significantly generalized across sessions over 6 hours. Electrode impedance or signal quality did not obviously deteriorate for 2 weeks following implantation. These findings open up a methodology to directly explore ECoG signals with reference to intracortical neuronal sources and would provide a key to developing minimally invasive next-generation brain-machine interfaces.lld:pubmed
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pubmed-article:20696254pubmed:authorpubmed-author:HasegawaIsaoIlld:pubmed
pubmed-article:20696254pubmed:authorpubmed-author:SuzukiTakafum...lld:pubmed
pubmed-article:20696254pubmed:authorpubmed-author:KamitaniYukiy...lld:pubmed
pubmed-article:20696254pubmed:authorpubmed-author:TodaHaruoHlld:pubmed
pubmed-article:20696254pubmed:authorpubmed-author:MajimaKeiKlld:pubmed
pubmed-article:20696254pubmed:authorpubmed-author:SawahataHiroh...lld:pubmed
pubmed-article:20696254pubmed:copyrightInfoCopyright © 2010 Elsevier Inc. All rights reserved.lld:pubmed
pubmed-article:20696254pubmed:issnTypeElectroniclld:pubmed
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pubmed-article:20696254pubmed:volume54lld:pubmed
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pubmed-article:20696254pubmed:pagination203-12lld:pubmed
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pubmed-article:20696254pubmed:year2011lld:pubmed
pubmed-article:20696254pubmed:articleTitleSimultaneous recording of ECoG and intracortical neuronal activity using a flexible multichannel electrode-mesh in visual cortex.lld:pubmed
pubmed-article:20696254pubmed:affiliationDepartment of Physiology, Niigata University School of Medicine, Niigata, Japan. toda@med.niigata-u.ac.jplld:pubmed
pubmed-article:20696254pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:20696254pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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