Modification of median nerve somatic evoked potentials by prior median nerve, peroneal nerve, and auditory stimulation

In a recovery function design, changes were measured in the somatic evoked potentials (SEP) to right median nerve (RMN) shocks preceded by stimulation of: the same nerve (RMN-RMN); the left median nerve having primary input to the homologous sensory area in the contralateral hemisphere (LMN-RMN); th...

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Veröffentlicht in:Electroencephalography and clinical neurophysiology 1987-07, Vol.68 (4), p.295-302
Hauptverfasser: Greenwood, P.M., Goff, W.R.
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description In a recovery function design, changes were measured in the somatic evoked potentials (SEP) to right median nerve (RMN) shocks preceded by stimulation of: the same nerve (RMN-RMN); the left median nerve having primary input to the homologous sensory area in the contralateral hemisphere (LMN-RMN); the right peroneal nerve having primary input to a different region of the same hemisphere (RPN-RMN); and the auditory nerve with primary input to a different sensory modality (AUD-RMN). Eight inter-stimulus intervals ranged from zero (simultaneous) to 2.5 sec. It was assumed that the degree of interaction between evoked potentials would be related to the degree to which common neural structures are activated or modulated in response to the stimuli. Results were: (a) the primary somatosensory response N20-P30 was little influenced by other somatic or auditory stimulation, interaction occurring predominantly in the RMN-RMN condition; (b) with increasing latency, components showed increasing interaction across modalities; (c) preceding homolateral stimulation (RPN-RMN) showed no greater interaction than preceding contralateral stimulation (LMN-RMN); (d) N55-P100 differed from the primary somatosensory response N20-P30 by showing greater interaction with other somatic stimuli; and (e) N140-P190 showed similarly shaped recovery functions across stimulus pairs but significant differences in magnitude of interaction. These results show that components with similar wave form and topographical characteristics can have different neurophysiological properties.
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Eight inter-stimulus intervals ranged from zero (simultaneous) to 2.5 sec. It was assumed that the degree of interaction between evoked potentials would be related to the degree to which common neural structures are activated or modulated in response to the stimuli. Results were: (a) the primary somatosensory response N20-P30 was little influenced by other somatic or auditory stimulation, interaction occurring predominantly in the RMN-RMN condition; (b) with increasing latency, components showed increasing interaction across modalities; (c) preceding homolateral stimulation (RPN-RMN) showed no greater interaction than preceding contralateral stimulation (LMN-RMN); (d) N55-P100 differed from the primary somatosensory response N20-P30 by showing greater interaction with other somatic stimuli; and (e) N140-P190 showed similarly shaped recovery functions across stimulus pairs but significant differences in magnitude of interaction. 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Electric activity recording</topic><topic>Evoked Potentials, Somatosensory</topic><topic>Humans</topic><topic>Investigative techniques, diagnostic techniques (general aspects)</topic><topic>Median Nerve - physiology</topic><topic>Medical sciences</topic><topic>Middle Aged</topic><topic>Nervous system</topic><topic>Peroneal Nerve - physiology</topic><toplevel>online_resources</toplevel><creatorcontrib>Greenwood, P.M.</creatorcontrib><creatorcontrib>Goff, W.R.</creatorcontrib><collection>Pascal-Francis</collection><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><jtitle>Electroencephalography and clinical neurophysiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Greenwood, P.M.</au><au>Goff, W.R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Modification of median nerve somatic evoked potentials by prior median nerve, peroneal nerve, and auditory stimulation</atitle><jtitle>Electroencephalography and clinical neurophysiology</jtitle><addtitle>Electroencephalogr Clin Neurophysiol</addtitle><date>1987-07-01</date><risdate>1987</risdate><volume>68</volume><issue>4</issue><spage>295</spage><epage>302</epage><pages>295-302</pages><issn>0168-5597</issn><issn>0013-4694</issn><eissn>1872-6380</eissn><coden>ECNEAZ</coden><abstract>In a recovery function design, changes were measured in the somatic evoked potentials (SEP) to right median nerve (RMN) shocks preceded by stimulation of: the same nerve (RMN-RMN); the left median nerve having primary input to the homologous sensory area in the contralateral hemisphere (LMN-RMN); the right peroneal nerve having primary input to a different region of the same hemisphere (RPN-RMN); and the auditory nerve with primary input to a different sensory modality (AUD-RMN). Eight inter-stimulus intervals ranged from zero (simultaneous) to 2.5 sec. It was assumed that the degree of interaction between evoked potentials would be related to the degree to which common neural structures are activated or modulated in response to the stimuli. Results were: (a) the primary somatosensory response N20-P30 was little influenced by other somatic or auditory stimulation, interaction occurring predominantly in the RMN-RMN condition; (b) with increasing latency, components showed increasing interaction across modalities; (c) preceding homolateral stimulation (RPN-RMN) showed no greater interaction than preceding contralateral stimulation (LMN-RMN); (d) N55-P100 differed from the primary somatosensory response N20-P30 by showing greater interaction with other somatic stimuli; and (e) N140-P190 showed similarly shaped recovery functions across stimulus pairs but significant differences in magnitude of interaction. 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identifier ISSN: 0168-5597
ispartof Electroencephalography and clinical neurophysiology, 1987-07, Vol.68 (4), p.295-302
issn 0168-5597
0013-4694
1872-6380
language eng
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source MEDLINE; Alma/SFX Local Collection
subjects Acoustic Stimulation
Adult
Afferent pathway interactions
Afferent Pathways - physiology
Biological and medical sciences
Cortical ERPs
Electrodiagnosis. Electric activity recording
Evoked Potentials, Somatosensory
Humans
Investigative techniques, diagnostic techniques (general aspects)
Median Nerve - physiology
Medical sciences
Middle Aged
Nervous system
Peroneal Nerve - physiology
title Modification of median nerve somatic evoked potentials by prior median nerve, peroneal nerve, and auditory stimulation
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