Change in the Brain's White Matter

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Science  05 Nov 2010:
Vol. 330, Issue 6005, pp. 768-769
DOI: 10.1126/science.1199139

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“Gray matter” is only one of two types of brain tissue; the other “white matter” is rarely mentioned. Yet white matter makes up half the human brain and has not been thought to be important in cognition or learning outside the context of pathology. That view could change. Imaging and cellular and molecular studies are revealing white matter plasticity with possible implications for normal cognitive function and psychological disorders.