Functional mapping of human motor cortical activation with conventional MR imaging at 1.5 T.
J Magn Reson Imaging
; 3(6): 869-75, 1993.
Article
en En
| MEDLINE
| ID: mdl-8280976
A conventional 1.5-T magnetic resonance (MR) imager was used to detect signal intensity changes on T2*-weighted images of human motor and sensory cortices during performance of hand and tongue movements. Narrow receiver bandwidths were used to improve the signal-to-noise ratio. Protocols consisting of baseline, motor task, rest, and second motor task periods were performed by nine volunteers. Two-dimensional cross correlation was applied to correct in-plane translation and rotation of the head during the imaging session before the control images were subtracted from the task images. Measurements obtained during finger movement tasks indicated a 3%-8% increase in signal intensity near the contralateral central sulcus and smaller ipsilateral signal intensity increases. Bilateral signal intensity increases were also observed during tongue movement studies. A retrospective image registration technique was used to map the signal changes onto conventional anatomic images, which were used to create integrated three-dimensional models of brain structure and function. These integrated images showed that the highest signal intensity due to hand movement was near the putative central sulcus.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Mapeo Encefálico
/
Imagen por Resonancia Magnética
/
Corteza Motora
Límite:
Adult
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Magn Reson Imaging
Asunto de la revista:
DIAGNOSTICO POR IMAGEM
Año:
1993
Tipo del documento:
Article
Pais de publicación:
Estados Unidos