Primary motor area activation during precision-demanding versus simple finger movement
| Autor: | Tiffany K. Grunewald, Ela Bhatt, James R. Carey, Edward J. Auerbach, Kristine R. Greer, Ovidiu Lungu, Ashima Nagpal, Jeff W. Wiemiller, Jennifer L. Steele |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Male medicine.medical_specialty Movement Rest Brain reorganization Stimulus (physiology) computer.software_genre Fingers 03 medical and health sciences Finger movement 0302 clinical medicine Physical medicine and rehabilitation Voxel Reference Values medicine Image Processing Computer-Assisted Humans Communication Motor area medicine.diagnostic_test business.industry Repetitive movements Healthy subjects Motor Cortex 030229 sport sciences General Medicine Magnetic Resonance Imaging Female Functional magnetic resonance imaging Psychology business computer 030217 neurology & neurosurgery Psychomotor Performance |
| Zdroj: | Neurorehabilitation and neural repair. 20(3) |
| ISSN: | 1545-9683 |
| Popis: | The authors used functional magnetic resonance imaging to explore whether the primary motor area (M1) serves a processing role in a finger-movement tracking task, emphasizing attention to accuracy, beyond its execution role of simple movements, with no attention to accuracy. Twenty healthy subjects performed alternating conditions: Rest, involving no finger movement; Track, involving careful control of a cursor along a target pathway with finger extension/flexion movements; and Move, involving finger extension/flexion movements without careful control. The authors compared volume of activated voxels in the M1, blood-oxygen-level-dependent (BOLD) signal intensity of activated voxels in the M1, and BOLD signal intensity of all voxels in the M1 between the Track and Move conditions. The results showed greater volume and signal intensity in both the contralateral and ipsilateral M1 during Track than during Move. Overall, the results suggest that the M1 is engaged not only in the execution of movements but also in spatial and temporal processing to produce accurately controlled movements. These findings invite further work exploring whether precision-demanding movements, such as tracking, form a more potent stimulus for promoting helpful brain reorganization in the M1 during the recovery from stroke than simple repetitive movements. |
| Databáze: | OpenAIRE |
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