A new device concept for directly modulating spinal cord pathways: initial in vivo experimental results
We describe a novel spinal cord (SC) stimulator that is designed to overcome a major shortcoming of existing stimulator devices: their restricted capacity to selectively activate targeted axons within the dorsal columns. This device overcomes that limitation by delivering electrical stimuli directly...
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Veröffentlicht in: | Physiological measurement 2012-12, Vol.33 (12), p.2003-2015 |
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container_title | Physiological measurement |
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creator | Flouty, Oliver Oya, Hiroyuki Kawasaki, Hiroto Wilson, Saul Reddy, Chandan G Jeffery, Nicholas D Brennan, Timothy J Gibson-Corley, Katherine N Utz, Marcel Gillies, George T Howard, Matthew A |
description | We describe a novel spinal cord (SC) stimulator that is designed to overcome a major shortcoming of existing stimulator devices: their restricted capacity to selectively activate targeted axons within the dorsal columns. This device overcomes that limitation by delivering electrical stimuli directly to the pial surface of the SC. Our goal in testing this device was to measure its ability to physiologically activate the SC and examine its capacity to modulate somatosensory evoked potentials (SSEPs) triggered by peripheral stimulation. In this acute study on adult sheep (n = 7), local field potentials were recorded from a grid placed in the subdural space of the right hemisphere during electrical stimulation of the left tibial nerve and the spinal cord. Large amplitude SSEPs (>200 µV) in response to SC stimulation were consistently obtained at stimulation strengths well below the thresholds inducing neural injury. Moreover, stimulation of the dorsal columns with signals employed routinely by devices in standard clinical use, e.g., 50 Hz, 0.2 ms pulse width, produced long-lasting changes (>4.5 h) in the SSEP patterns produced by subsequent tibial nerve stimulation. The results of these acute experiments demonstrate that this device can be safely secured to the SC surface and effectively activate somatosensory pathways. |
doi_str_mv | 10.1088/0967-3334/33/12/2003 |
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The results of these acute experiments demonstrate that this device can be safely secured to the SC surface and effectively activate somatosensory pathways.</description><identifier>ISSN: 0967-3334</identifier><identifier>EISSN: 1361-6579</identifier><identifier>DOI: 10.1088/0967-3334/33/12/2003</identifier><identifier>PMID: 23151433</identifier><identifier>CODEN: PMEAE3</identifier><language>eng</language><publisher>England: IOP Publishing</publisher><subject>Animals ; Axon guidance ; Axons - metabolism ; intradural device ; neuromodulation ; Sheep ; Spinal Cord - cytology ; Spinal Cord - physiology ; spinal cord stimulation ; Spinal Cord Stimulation - instrumentation</subject><ispartof>Physiological measurement, 2012-12, Vol.33 (12), p.2003-2015</ispartof><rights>2012 Institute of Physics and Engineering in Medicine</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c381t-57ea70cdb6926728ea6f779879fa942565a3d338e663a2a7725e611c263b7ef33</citedby><cites>FETCH-LOGICAL-c381t-57ea70cdb6926728ea6f779879fa942565a3d338e663a2a7725e611c263b7ef33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/0967-3334/33/12/2003/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,780,784,27924,27925,53846,53893</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23151433$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Flouty, Oliver</creatorcontrib><creatorcontrib>Oya, Hiroyuki</creatorcontrib><creatorcontrib>Kawasaki, Hiroto</creatorcontrib><creatorcontrib>Wilson, Saul</creatorcontrib><creatorcontrib>Reddy, Chandan G</creatorcontrib><creatorcontrib>Jeffery, Nicholas D</creatorcontrib><creatorcontrib>Brennan, Timothy J</creatorcontrib><creatorcontrib>Gibson-Corley, Katherine N</creatorcontrib><creatorcontrib>Utz, Marcel</creatorcontrib><creatorcontrib>Gillies, George T</creatorcontrib><creatorcontrib>Howard, Matthew A</creatorcontrib><title>A new device concept for directly modulating spinal cord pathways: initial in vivo experimental results</title><title>Physiological measurement</title><addtitle>PM</addtitle><addtitle>Physiol. Meas</addtitle><description>We describe a novel spinal cord (SC) stimulator that is designed to overcome a major shortcoming of existing stimulator devices: their restricted capacity to selectively activate targeted axons within the dorsal columns. This device overcomes that limitation by delivering electrical stimuli directly to the pial surface of the SC. Our goal in testing this device was to measure its ability to physiologically activate the SC and examine its capacity to modulate somatosensory evoked potentials (SSEPs) triggered by peripheral stimulation. In this acute study on adult sheep (n = 7), local field potentials were recorded from a grid placed in the subdural space of the right hemisphere during electrical stimulation of the left tibial nerve and the spinal cord. Large amplitude SSEPs (>200 µV) in response to SC stimulation were consistently obtained at stimulation strengths well below the thresholds inducing neural injury. Moreover, stimulation of the dorsal columns with signals employed routinely by devices in standard clinical use, e.g., 50 Hz, 0.2 ms pulse width, produced long-lasting changes (>4.5 h) in the SSEP patterns produced by subsequent tibial nerve stimulation. The results of these acute experiments demonstrate that this device can be safely secured to the SC surface and effectively activate somatosensory pathways.</description><subject>Animals</subject><subject>Axon guidance</subject><subject>Axons - metabolism</subject><subject>intradural device</subject><subject>neuromodulation</subject><subject>Sheep</subject><subject>Spinal Cord - cytology</subject><subject>Spinal Cord - physiology</subject><subject>spinal cord stimulation</subject><subject>Spinal Cord Stimulation - instrumentation</subject><issn>0967-3334</issn><issn>1361-6579</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkUFv1DAQhS1URLeFf4CQj72k6_EkdsKtqgpUWokLnC2vMymusnGwnW333-PVlh7hMiONvjejeY-xjyCuQbTtWnRKV4hYrxHXINdSCHzDVoAKKtXo7oytXpFzdpHSoxAArWzesXOJ0ECNuGIPN3yiJ97T3jviLkyO5syHEHnvI7k8Hvgu9Mtos58eeJr9ZMeCxZ7PNv96sof0mfvJZ1_GfuJ7vw-cnmeKfkdTLsNIaRlzes_eDnZM9OGlX7KfX-5-3H6rNt-_3t_ebCqHLeSq0WS1cP1WdVJp2ZJVg9Zdq7vBdrVsVGOxR2xJKbTSai0bUgBOKtxqGhAv2dVp7xzD74VSNjufHI2jnSgsyUANHWpRS_l_VEoAqTVAQesT6mJIKdJg5vKgjQcDwhzTMEerzdHqUorSHNMosk8vF5btjvpX0V_7CyBOgA-zeQxLLO6mf-_8Awtqk0c</recordid><startdate>20121201</startdate><enddate>20121201</enddate><creator>Flouty, Oliver</creator><creator>Oya, Hiroyuki</creator><creator>Kawasaki, Hiroto</creator><creator>Wilson, Saul</creator><creator>Reddy, Chandan G</creator><creator>Jeffery, Nicholas D</creator><creator>Brennan, Timothy J</creator><creator>Gibson-Corley, Katherine N</creator><creator>Utz, Marcel</creator><creator>Gillies, George T</creator><creator>Howard, Matthew A</creator><general>IOP Publishing</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7TK</scope></search><sort><creationdate>20121201</creationdate><title>A new device concept for directly modulating spinal cord pathways: initial in vivo experimental results</title><author>Flouty, Oliver ; Oya, Hiroyuki ; Kawasaki, Hiroto ; Wilson, Saul ; Reddy, Chandan G ; Jeffery, Nicholas D ; Brennan, Timothy J ; Gibson-Corley, Katherine N ; Utz, Marcel ; Gillies, George T ; Howard, Matthew A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c381t-57ea70cdb6926728ea6f779879fa942565a3d338e663a2a7725e611c263b7ef33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Animals</topic><topic>Axon guidance</topic><topic>Axons - metabolism</topic><topic>intradural device</topic><topic>neuromodulation</topic><topic>Sheep</topic><topic>Spinal Cord - cytology</topic><topic>Spinal Cord - physiology</topic><topic>spinal cord stimulation</topic><topic>Spinal Cord Stimulation - instrumentation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Flouty, Oliver</creatorcontrib><creatorcontrib>Oya, Hiroyuki</creatorcontrib><creatorcontrib>Kawasaki, Hiroto</creatorcontrib><creatorcontrib>Wilson, Saul</creatorcontrib><creatorcontrib>Reddy, Chandan G</creatorcontrib><creatorcontrib>Jeffery, Nicholas D</creatorcontrib><creatorcontrib>Brennan, Timothy J</creatorcontrib><creatorcontrib>Gibson-Corley, Katherine N</creatorcontrib><creatorcontrib>Utz, Marcel</creatorcontrib><creatorcontrib>Gillies, George T</creatorcontrib><creatorcontrib>Howard, Matthew A</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Neurosciences Abstracts</collection><jtitle>Physiological measurement</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Flouty, Oliver</au><au>Oya, Hiroyuki</au><au>Kawasaki, Hiroto</au><au>Wilson, Saul</au><au>Reddy, Chandan G</au><au>Jeffery, Nicholas D</au><au>Brennan, Timothy J</au><au>Gibson-Corley, Katherine N</au><au>Utz, Marcel</au><au>Gillies, George T</au><au>Howard, Matthew A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A new device concept for directly modulating spinal cord pathways: initial in vivo experimental results</atitle><jtitle>Physiological measurement</jtitle><stitle>PM</stitle><addtitle>Physiol. 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Large amplitude SSEPs (>200 µV) in response to SC stimulation were consistently obtained at stimulation strengths well below the thresholds inducing neural injury. Moreover, stimulation of the dorsal columns with signals employed routinely by devices in standard clinical use, e.g., 50 Hz, 0.2 ms pulse width, produced long-lasting changes (>4.5 h) in the SSEP patterns produced by subsequent tibial nerve stimulation. The results of these acute experiments demonstrate that this device can be safely secured to the SC surface and effectively activate somatosensory pathways.</abstract><cop>England</cop><pub>IOP Publishing</pub><pmid>23151433</pmid><doi>10.1088/0967-3334/33/12/2003</doi><tpages>13</tpages></addata></record> |
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subjects | Animals Axon guidance Axons - metabolism intradural device neuromodulation Sheep Spinal Cord - cytology Spinal Cord - physiology spinal cord stimulation Spinal Cord Stimulation - instrumentation |
title | A new device concept for directly modulating spinal cord pathways: initial in vivo experimental results |
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