Ipsilateral hemisphere activation during motor and sensory tasks.
AJNR Am J Neuroradiol
; 17(4): 651-5, 1996 Apr.
Article
em En
| MEDLINE
| ID: mdl-8730183
ABSTRACT
PURPOSE:
To compare activation of the ipsilateral cerebral hemisphere during tactile sensory and motor tasks involving the right and left hands.METHODS:
Eight volunteers had functional MR imaging to measure the extent of cerebral hemisphere activation during a motor task and sensory task involving each hand. Hemispheric indexes (left hemisphere activation minus right hemisphere activation)/(left hemisphere activation plus right hemisphere activation) were computed for each hand and each task. The indexes for two tasks and the two hands were compared.RESULTS:
The left-hand motor tasks activated the ipsilateral hemisphere in right handers significantly more than did the right-hand tasks. Motor tasks produced a greater activation of the ipsilateral hemisphere than did the sensory tasks. No significant differences were found between the hemispheric indexes for the right-hand and left-hand sensory tasks.CONCLUSION:
This study confirms findings of a previous study, showing that the left hemisphere is active in left-hand motor tasks. Activation of the ipsilateral hemisphere is significantly less pronounced during sensory tasks than during motor tasks.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tato
/
Imageamento por Ressonância Magnética
/
Córtex Cerebral
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Dominância Cerebral
/
Lateralidade Funcional
/
Atividade Motora
Limite:
Adolescent
/
Adult
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
AJNR Am J Neuroradiol
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Estados Unidos