05-26-2007, 01:08 PM
cc.....because myelination is not fully doneat this age
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brain mri - zkadhem
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05-26-2007, 01:12 PM
zkadhem please may I know the source of those your great questions?
05-26-2007, 01:17 PM
The answer is: C
Extensive myelination occurs in postnatal development. The failure of the pyramidal tracts to form myelin would account for the reduction in their size. In this particular situation, the size of the cerebral cortex was approximately normal, suggesting that there was no significant decrease in cortical cells. Variation in the numbers of synaptic contacts, transmitter formation, and glial cells would not account for a reduction in the size of the pyramidal tract |
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