Re: [xmca] LSV on the preschool stage

[Martin Packer <packer@duq.edu>]

On the issue of speech becoming 'inner physiologically,' here are the results of an hour's Googling.

The principal brain region involved in speech production is Broca’s area. The principal brain region involved in word recognition is Wernicke’s area. Broca’s and Wernicke’s areas are connected by a bundle of nerve fibres: the arcuate fasciculus. Lesion studies confirm that it is involved with language. It is much larger in adult humans than in chimps or monkeys. MRI studies of children from 4 to 17 have found increase the white matter of this link with age, and only in the left hemisphere.

Rilling, J. K., Glasser, M. F., Preuss, T. M., Ma, X., Zhao, T., Hu, X., et al. (2008). The evolution of the arcuate fasciculus revealed with comparative DTI. Nature Neuroscience, 11(4), 426-8.
	
Paus, T., Zijdenbos, A., Worsley, K., Collins, D. L., Blumenthal, J., Giedd, J. N., et al. (1999). Structural maturation of neural pathways in children and adolescents: in vivo study. Science, 283(5409), 1908-11._______________________________________________
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