Amplitude of somatosensory cortical evoked potentials is correlated with spontaneous activity of spinal neurons in the cat E. Manjarrez, G. Rojas-Piloni,

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Presentation transcript:

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):

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