Paula, you posted while I was editing and making more sense out of my last post, so please read it again.

Thanks for the heads up about stuttering. This looks interesting, too:

J Commun Disord. 2004 Jul-Aug;37(4):325-69.
Stuttering and the basal ganglia circuits: a critical review of possible relations.

http://www.ncbi.nlm.nih.gov/entrez/q...&dopt=Citation

full article:

http://www.sciencedirect.com/science...3d1bc6e0fe1a6b