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      Shortening of the cortical silent period following transcranial magnetic brain stimulation during an experimental paradigm for generating contingent negative variation (CNV)

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      Clinical Neurophysiology
      Elsevier BV

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          Abstract

          We investigated changes in the cortical silent period (CSP) following transcranial magnetic cortical stimulation (TCMS) during a standard paradigm which was designed to evoke contingent negative variation (CNV) in ten normal subjects. We recorded the motor evoked potentials (MEP) and CSP during the inter-stimulus interval (ISI) of a CNV paradigm in ten normal subjects. The CNV paradigm consisted of a visual warning stimulus (S1) followed by a visual response stimulus (S2). The CSP following TCMS on the hand motor area was recorded from mildly contracted first dorsal interosseous muscles. The CSP was significantly shortened during the ISI (P < 0.01, t test) with a highly significant correlation with the TCMS timing during the ISI (P < 0.02, Spearman's correlation coefficient), while the MEP amplitude and latency were unchanged. The results suggested that shortening of the CSP was associated with neural processes related to preparation for voluntary movement during the paradigm.

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          Author and article information

          Journal
          Clinical Neurophysiology
          Clinical Neurophysiology
          Elsevier BV
          13882457
          August 1999
          August 1999
          : 110
          : 8
          : 1394-1398
          Article
          10.1016/S1388-2457(99)00110-8
          10454275
          437bd46b-92f5-4b05-a15b-95c5158d56be
          © 1999

          https://www.elsevier.com/tdm/userlicense/1.0/

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