03 April 2012
Vol 5, Issue 218

About The Cover

Cover image expansion

Online Cover This week features two Research Articles about astrocytes, one that describes how astrocytes may modulate synaptic activity by changing the local concentration of extracellular K+ and another that identifies an mGluR5-selective diffusion barrier that enriches mGluR5 in astrocytic processes. The image shows a cortical human astrocyte labeled so as to outline the fine perisynaptic processes. [Image: Nancy Ann Oberheim and Takahiro Takano, University of Rochester Medical School]