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Titolo:
CORTICOMOTOR THRESHOLD TO MAGNETIC STIMULATION - NORMAL VALUES AND REPEATABILITY
Autore:
MILLS KR; NITHI KA;
Indirizzi:
UNIV OXFORD,RADCLIFFE INFIRM,CLIN NEUROPHYSIOL UNIT,DEPT CLIN NEUROL OXFORD OX2 6HE ENGLAND
Titolo Testata:
Muscle & nerve
fascicolo: 5, volume: 20, anno: 1997,
pagine: 570 - 576
SICI:
0148-639X(1997)20:5<570:CTTMS->2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
CENTRAL MOTOR CONDUCTION; BRAIN-STIMULATION; CORTICAL EXCITABILITY; MULTIPLE-SCLEROSIS; EVOKED-POTENTIALS; NEURON DISEASE; SPINAL-CORD; CORTEX; MIGRAINE; EPILEPSY;
Keywords:
MAGNETIC STIMULATION; CORTICOMOTOR THRESHOLD; NORMAL VALUES; REPEATABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
K.R. Mills e K.A. Nithi, "CORTICOMOTOR THRESHOLD TO MAGNETIC STIMULATION - NORMAL VALUES AND REPEATABILITY", Muscle & nerve, 20(5), 1997, pp. 570-576

Abstract

The threshold for corticomotor excitation by magnetic stimuli is a clinically important parameter in the assessment of central motor conduction. Hitherto, arbitrary criteria have been adopted to define threshold and there are few published data using a figure of eight coil. A new method is described in which the highest stimulus intensity evoking responses in the relaxed first dorsal interosseous muscle with a probability of zero [lower threshold (LT)] and the lowest intensity evokingresponses with a probability of one [upper threshold (UT)] have been determined. The method, which utilizes a coil located and optimally oriented over hand motor cortex, minimizes the number of stimuli needed. Both LT and UT are normally distributed and are independent of age, gender, and hemisphere. In 102 healthy hands of 55 control subjects 23-84 years of age, mean +/- SD UT was 46.6 +/- 9.4% and LT was 38.0 +/- 8.6% maximum stimulator output. Repeatability estimates indicated an absolute change of more than 13% or 11% in UT or LT respectively in thesame individual over 1-3 months was significant at the 5% level. (C) 1997 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 09:34:45