Tonic neuronal activation during simple and complex finger movements analyzed by DC-magnetoencephalography.
Neurosci Lett
; 394(1): 42-7, 2006 Feb 06.
Article
em En
| MEDLINE
| ID: mdl-16249054
ABSTRACT
Functional neuroimaging techniques map neuronal activation indirectly via local concomitant cortical vascular/metabolic changes. In a complementary approach, DC-magnetoencephalography measures neuronal activation dynamics directly, notably in a time range of the slow vascular/metabolic response. Here, using this technique neuronal activation dynamics and patterns for simple and complex finger movements are characterized intraindividually in 6/6 right-handed subjects contralateral prolonged (30 s each) complex self-paced sequential finger movements revealed stronger field amplitudes over the pericentral sensorimotor cortex than simple movements. A consistent lateralization for contralateral versus ipsilateral finger movements was not found (4/6). A subsequent sensory paradigm focused on somatosensory afferences during the motor tasks and the reliability of the measuring technique. In all six subjects stable sustained neuronal activation during electrical median nerve stimulation was recorded. These neuronal quasi-tonic activation characteristics provide a new non-invasive neurophysiological measure to interpret signals mapped by functional neuroimaging techniques.
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Base de dados:
MEDLINE
Assunto principal:
Desempenho Psicomotor
/
Mapeamento Encefálico
/
Magnetoencefalografia
/
Dedos
/
Córtex Motor
/
Movimento
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Neurosci Lett
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Alemanha