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Titolo:
Cutaneous and mixed nerve silent periods in syringomyelia
Autore:
Stetkarova, I; Kofler, M; Leis, AA;
Indirizzi:
Mississippi Methodist Rehabil Ctr, Jackson, MS 39216 USA Mississippi Methodist Rehabil Ctr Jackson MS USA 39216 kson, MS 39216 USA Na Homolce Hosp, Dept Neurol, Prague, Czech Republic Na Homolce Hosp Prague Czech Republic pt Neurol, Prague, Czech Republic Hosp Hochzirl, Dept Neurol, Zirl, Austria Hosp Hochzirl Zirl AustriaHosp Hochzirl, Dept Neurol, Zirl, Austria
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 1, volume: 112, anno: 2001,
pagine: 78 - 85
SICI:
1388-2457(200101)112:1<78:CAMNSP>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOTOR-NEURON EXCITABILITY; MAGNETIC STIMULATION; CORTEX; POTENTIALS; REFLEXES; MUSCLES;
Keywords:
cutaneous silent period; mixed nerve silent period; syringomyelia; exteroceptive suppression; somatosensory evoked potentials; motor evoked potentials;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Leis, AA Mississippi Methodist Rehabil Ctr, Jackson, MS 39216 USA Mississippi Methodist Rehabil Ctr Jackson MS USA 39216 39216 USA
Citazione:
I. Stetkarova et al., "Cutaneous and mixed nerve silent periods in syringomyelia", CLIN NEU, 112(1), 2001, pp. 78-85

Abstract

Objectives and methods: We studied cutaneous and mixed nerve silent periods (CSP, MNSP) in 4 patients with cervical syringomyelia documented by magnetic resonance imaging who on clinical examination presented with unilateralhypalgesia and hypothermesthesia. In addition, we recorded upper and lowerextremity somatosensory and motor evoked potentials (SEP, MEP), and cortical silent periods. Results: In all patients, CSP and the later portion of MNSP were absent orshortened on their affected side, while both were normal on their unaffected side. In all patients, SEP latencies were normal following both median and tibial nerve stimulation. In two patients, the amplitude N13 (median nerve SEP), and in one patient each the amplitudes N20 (median nerve SEP) and P37 (tibial nerve SEP) were reduced. Central motor conduction time was prolonged to abductor digiti minimi muscle in one patient on the affected side,but was normal to tibialis anterior muscle in all patients. Cortical silent periods where present bilaterally in spite of unilateral complete absenceof CSP and MNSP in two subjects tested. Loss of CSP and MNSP were a sensitive parameter of spinal cord dysfunction in syringomyelia. The cervical median nerve SEP response N13 reflected gray matter involvement, while corticospinal tract dysfunction was less frequently observed. Conclusion: Our data suggest that CSP and later portion of MNSP are generated at the spinal level by the same small myelinated A-delta fibers, and that their central network is distinct from large diameter fiber afferents and efferents. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 21:37:24