the administration , in a double blind experiment , of piracetam to two homogeneous groups of 32 and 34 eight- to twelve-year-old brain-injured special education children lacking normal mental ability , where the daily doses administered for a period of thirteen weeks were 3 tablets or 1.2 g ( administered to second and third graders ) and 5 tablets or 2.0 g ( administered to fourth graders ) , respectively , did not produce a lasting effect upon the capacity to acquire and apply knowledge , the concentration power , the proficiency level , and the behavior shown by pupils during and out of school hours .
C0006104
brain
C0004927
behavior