Amplitude of somatosensory cortical evoked potentials is

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					  Amplitude of somatosensory cortical
  evoked potentials is correlated with
spontaneous activity of spinal neurons in
                the cat

   E. Manjarrez, G. Rojas-Piloni, L. Martinez, D.
      Vazquez, D. Velez, I. Mendez, A. Flores

     Neuroscience Letters 323(2002):187-190
              Introduction
• Negative cord dorsum potential (CDP)
• Monosynaptic reflexes and CDPs
• Cortical neurons and dorsal horn spinal
  neurons
              Question
• Correlation between spontaneous
  negative CDPs and somatosensory
  cortical evoked potential
                    Method
•   Adult cats
•   Recording site:
    1. Layer 3 to 6 of somatosensory cortex(S1)
       (glass micropipette)
    2. L6 dorsal horn surface of lumbo-sacral spinal
       segment (silver ball electrode)
• Stimulating site:
  – Electrical: Sural(SU) and superficial
    peroneus(SP)
  – Mechanical: hindpaw
                 Result
• High positive correlation between
  amplitude fluctuations of spontaneous
  negative CDPs and fluctuations of the
  cortical evoked potential

				
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posted:7/29/2012
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