Functional magnetic resonance imaging of the primary motor cortex in humans: response to increased functional demands.
J Biosci
;
2001 Jun; 26(2): 205-15
Article
Dans Anglais
| IMSEAR
| ID: sea-110681
ABSTRACT
Functional magnetic resonance imaging (fMRI) studies have been performed on 20 right handed volunteers at 1.5 Tesla using echo planar imaging (EPI) protocol. Index finger tapping invoked localized activation in the primary motor area. Consistent and highly reproducible activation in the primary motor area was observed in six different sessions of a volunteer over a period of one month. Increased tapping rate resulted in increase in the blood oxygenation level dependent (BOLD) signal intensity as well as the volume/area of activation (pixels) in the contralateral primary motor area up to tapping rate of 120 taps/min (2 Hz), beyond which it saturates. Activation in supplementary motor area was also observed. The obtained results are correlated to increased functional demands.
Texte intégral:
Disponible
Indice:
IMSEAR (Asie du Sud-Est)
Sujet Principal:
Cartographie cérébrale
/
Femelle
/
Humains
/
Mâle
/
Imagerie par résonance magnétique
/
Adulte
/
Doigts
/
Activité motrice
/
Cortex moteur
langue:
Anglais
Texte intégral:
J Biosci
Année:
2001
Type:
Article
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