Is cerebral mielination really necessary?

[Carlos M. S. Antunes]

In article <879768948.15418 at dejanews.com>,
	pspangle at worldnet.att.net writes:
> 
> Myelin acts (in a sense) as an electrical insulator that speeds
> transmission of information along neural axons by about a factor of up to
> 10.
> 

What happens to a fetus if myelination doesn't happen at all?

Regards,
Carlos Antunes.

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