Correction to: Journal of Cerebral Blood Flow & Metabolism (2010) 30, 1625–1636; doi:10.1038/jcbfm.2010.29; published online 17 March 2010
Following the publication of this article, the authors noted that panels B and C were switches in Figures 1 and 2. The revised figures appear below:
Figure 1.
Figure 2.


