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  • Epidural and subpial cortico-spinal potentials evoked by transcutaneous motor cortex stimulation during spinal cord surgery
    Prestor, Borut ; Žgur, Tomaž ; Dolenc, Vinko V.
    Cortico-spinal potentials (CSPs) to transcutaneous motor cortex stimulation were recorded epidurally and subpially in 8 patients undergoittg spinal cord surgery. In 6 patients without cortico-spinal ... tract involvement, a CSP consisted of a direct (D) wave, which was followed by indirect (I) waves at a higher stimulus intensity. The D wave appearcd at 25-50 per cent of the maximum stimulus intensity. With increasing stimulus its amplitude levelled off betwcen 10 and 30 microV when recorded epidurally. At high stimulus a prominent indirect potential (I' wave) appeared which followed the D wave after 2.2-3.6 msec. lite D and I' wave conduction v©locities calculated in 3 cascs werc idcntical - 65, 70 and 80 m/sec. Subpial records had largcr amplitudes than epidural ones but were of the same configuration. In 2 patients with spastic paraparesis the CSP changes were detected below the site of the cord lesion.
    Vir: New trends and advanced techniques in clinical neurophysiology (str. 348-351)
    Vrsta gradiva - članek, sestavni del
    Leto - 1990
    Jezik - angleški
    COBISS.SI-ID - 1463257

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