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Movement-associated cortical potentials in unilateral cerebral lesions

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Summary

Movement-associated cortical potentials (MP) associated with thumb-opposition or fist-clenching were studied in 20 patients with unilateral cerebral lesions and in 8 healthy subjects. MP was abnormal in 16 patients. The most frequent abnormality was an attenuation of the N component or readiness potential, recorded on the central region contralateral to the contracting muscle, on the affected hemisphere. The occurrence and severity of MP abnormalities seem to be influenced by an intensity and extension of the lesion, rather than by how much disability is present in the affected limb. There was no significant correlation between the abnormalities of MP and of EEG. The most useful index of MP for comparing two hemispheres was shown to be the amplitude and wave form of the N component or readiness potential contralateral to the contracting muscle.

Zusammenfassung

Corticale Potentiale, assoziiert mit Daumenopposition oder Faustmachen, wurden bei 20 Patienten mit unilateralen cerebralen Läsionen und bei 8 gesunden Männern studiert. Die bewegungsassoziierten, cerebralen Potentiale (MP) waren abnorm bei 16 Patienten. Die häufigste Abnormität war eine Depression der N-Komponente oder des Bereitschaftspotentiales, registriert über der Zentralregion kontralateral zum zusammenziehenden Muskel über der beschädigten Hemisphäre. Vorkommen und Grad der MP-Abnormitäten schienen mehr von einer Intensität und Extension der Läsion als von einem Störungsgrad der gestörten Hand beeinflußt zu sein. Keine bedeutende Korrelation war vorhanden zwischen den MP-Abnormitäten und den EEG-Abnormitäten. Der wirksamste Index der MP zum Vergleich beider Hemisphären war eine Amplitude und Wellenform der N-Komponente oder des Bereitschaftspotentiales kontralateral zum zusammenziehenden Muskel.

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Authors and Affiliations

  1. Department of Neurology, Neurological Institute, Faculty of Medicine, Kyushu University, Fukuoka City, Japan

    H. Shibasaki

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  1. H. Shibasaki
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Shibasaki, H. Movement-associated cortical potentials in unilateral cerebral lesions. J. Neurol. 209, 189–198 (1975). https://doi.org/10.1007/BF00312541

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