American Journal of Neuroradiology, Vol 19, Issue 2 275-280, Copyright © 1998 by American Society of Neuroradiology
ARTICLES |
Functional MR imaging of cortical activation of the cerebral hemispheres during motor tasks
LN Singh, S Higano, S Takahashi, Y Abe, M Sakamoto, N Kurihara, S Furuta, H Tamura, I Yanagawa, T Fujii, T Ishibashi, S Maruoka and S Yamada
Department of Radiology, Tohoku University School of Medicine, Sendai, Japan.
PURPOSE: We used functional MR imaging to evaluate cortical activation in the precentral, central, and postcentral regions of the contralateral and ipsilateral cerebral hemispheres during left- and right-handed motor tasks. METHODS: Ten healthy right-handed volunteers were studied with echo-planner MR imaging (1.5 T) while performing alternating finger apposition tasks with both hands. During the hand tasks, the areas of activated pixels were compared between subregions (precentral, central, and postcentral) of the contralateral and ipsilateral sensorimotor cortex. RESULTS: The activated area of the contralateral sensorimotor cortex was significantly larger than that of the ipsilateral cortex during tasks with either hand, whereas the ipsilateral activated area was significantly larger during the left- handed task than during the right-handed task. Ipsilateral activation was greatest in the precentral region, less in the central region, and least prominent in the postcentral region. CONCLUSIONS: Our results confirmed those of previous investigators that ipsilateral activation is more pronounced during left-sided movements than during right-sided movements. The variation in activation of the precentral, central, and postcentral subregions suggests different roles of the ipsilateral and contralateral hemispheres during motor tasks.
This article has been cited by other articles:
 |
|
 |
|
  K. J. Wisneski, N. Anderson, G. Schalk, M. Smyth, D. Moran, and E. C. Leuthardt Unique Cortical Physiology Associated With Ipsilateral Hand Movements and Neuroprosthetic Implications Stroke, December 1, 2008; 39(12): 3351 - 3359. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Y. Terao, T. Furubayashi, S. Okabe, N. Arai, H. Mochizuki, S. Kobayashi, M. Yumoto, M. Nishikawa, N. K. Iwata, and Y. Ugawa Interhemispheric Transmission of Visuomotor Information for Motor Implementation Cereb Cortex, July 1, 2005; 15(7): 1025 - 1036. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
I. Derakhshan, M. Hund-Georgiadis, and D. Y. von Cramon Crossed Nonaphasia in a Dextral With Left Hemispheric Lesions: Handedness Technically Defined * Response Stroke, July 1, 2002; 33(7): 1749 - 1750. [Full Text] [PDF]
|
|
|
|
 |
|
 V. Holloway, D. G. Gadian, F. Vargha-Khadem, D. A. Porter, S. G. Boyd, and A. Connelly The reorganization of sensorimotor function in children after hemispherectomy: A functional MRI and somatosensory evoked potential study Brain, December 1, 2000; 123(12): 2432 - 2444. [Abstract] [Full Text] [PDF]
|
|