ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The aim of this study was to evaluate effects of short-term repetitive-bilateral exercise onthe activation of motor network using functional magnetic resonance imaging (fMRI). Eight controlsubjects and four chronic hemiparetic patients were investigated for the present study. The trainingprogram with a symmetrical upper-limb motion trainer was performed at 1 hr/day, 5 days/week during6 weeks. Fugl-Meyer assessments (FMA) were performed every two weeks during the training. Wecompared cerebral and cerebellar cortical activations in two different tasks before and after thetraining program: (1) the only unaffected hand movement (Task 1), and (2) passive movements of theaffected hand by the active movement of the unaffected hand (Task 2). fMRI was performed at 3Twith wrist flexion-extension movement at 1 Hz during the motor tasks. All patients showedsignificant improvements of FMA scores in their paretic limbs after training. fMRI studies in Task 1showed that cortical activations decreased in ipsilateral SMC but increased in contralateralsensorimotor cortex (SMC) and ipsilateral cerebellum (CRB). Task 2 showed cortical reorganizationsin bilateral SMC, pre-motor area (PMA), supplementary area (SMA) and CRB. This studydemonstrated that plastic changes of motor network occurred as a neural basis of the improvementsubsequent to repetitive-bilateral exercises using the symmetrical upper-limb motion trainer
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1016.pdf
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