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Titolo:
Coherence between cortical and muscular activities after subcortical stroke
Autore:
Mima, T; Toma, K; Koshy, B; Hallett, M;
Indirizzi:
NINCDS, Med Neurol Branch, Human Motor Control Sect, NIH, Bethesda, MD 20892 USA NINCDS Bethesda MD USA 20892 or Control Sect, NIH, Bethesda, MD 20892 USA
Titolo Testata:
STROKE
fascicolo: 11, volume: 32, anno: 2001,
pagine: 2597 - 2601
SICI:
0039-2499(200111)32:11<2597:CBCAMA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION-TOMOGRAPHY; HEMIPLEGIC CEREBRAL-PALSY; MOTOR CORTEX; ISOMETRIC CONTRACTION; MAGNETIC STIMULATION; HAND MUSCLE; REORGANIZATION; RECOVERY; PLASTICITY; PATHWAYS;
Keywords:
electroencephalogram; electromyogram; motor cortex;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Hallett, M NINCDS, Med Neurol Branch, Human Motor Control Sect, NIH, Bldg 10,Room 5N226,10 Ctr Dr,MSC1428, Bethesda, MD 20892 USA NINCDS Bldg 10,Room5N226,10 Ctr Dr,MSC1428 Bethesda MD USA 20892
Citazione:
T. Mima et al., "Coherence between cortical and muscular activities after subcortical stroke", STROKE, 32(11), 2001, pp. 2597-2601

Abstract

Background and Purpose-Functional connection between the motor cortex and muscle can be measured by electroencephalogram-electromyogram (EEG-EMG) coherence. To evaluate the functional connection to muscle between contralateral and ipsilateral motor cortices after pyramidal tract lesions, we investigated 6 patients with chronic subcortical stroke. Methods-High-resolution EEG and EMG of the hand, forearm, and biceps muscles were recorded during 3 tonic contraction tasks: (1) elbow flexion, (2) wrist extension, and (3) power grip. To evaluate the cortical control of EMG, EEG-EMG coherence was computed. Results-EEG-EMG coherence was localized over the contralateral sensorimotor area in all circumstances, and there was no significant coherence at the ipsilateral side. EEG-EMG coherence was significantly smaller on the affected side for the hand and forearm muscles but not for the biceps muscle. Conclusions-All direct functional connections to muscle after recovered subcortical stroke come from the contralateral. motor cortex. The different effects of the lesion on the proximal and distal muscles appear to be associated with the strength of the corticospinal pathway.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 17:58:00