The activation pattern of putamen, internal and external division of globus pallidus was investigated during rapid pronation and supination of the right and left hand in 12 normal volunteers using a FLASH sequence with high resolution for functional magnetic resonance imaging (fMRI) at 1.5 T. The activated areas within putamen, internal and external division of globus pallidus were less than 5 mm2. 
The external division of the globus pallidus displayed very little immunoreactivity.
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