Functional MRI of human primary somatosensory and motor cortex during median nerve stimulation.
Clin Neurophysiol
; 110(1): 47-52, 1999 Jan.
Article
em En
| MEDLINE
| ID: mdl-10348320
ABSTRACT
OBJECTIVES:
Somatosensory evoked potential (SEP) studies suggested that some early cortical SEP components may be generated in the primary motor cortex (M1) rather than the primary somatosensory cortex (S1).METHODS:
We now used functional magnetic resonance imaging (fMRI) to study activation of S1 and M1 by electrical median nerve stimulation in healthy volunteers.RESULTS:
The hand areas of both S1 and M1 showed significant activation (correlation coefficients >0.45) in 7 of 9 subjects (activated volume S1 > M1). For comparison, a sequential finger opposition task significantly activated S1 in 7 and M1 in all 9 subjects (activated volume M1 > S1).CONCLUSIONS:
These data show that the electrical stimuli used for SEP recording lead to a functional activation of S1 as well as M1.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Córtex Somatossensorial
/
Nervo Mediano
/
Córtex Motor
Limite:
Adult
/
Humans
/
Middle aged
Idioma:
En
Revista:
Clin Neurophysiol
Assunto da revista:
NEUROLOGIA
/
PSICOFISIOLOGIA
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Alemanha