Cover Picture: The cover shows Cajal-Retzius cells in an explant culture of newborn mouse cortex after four days in vitro. The marginal zone has been flattened out, allowing one to `look down' on the Cajal-Retzius cells which were stained with antibodies to calretinin and visualized using a laser con-focal microscope. This photo is relevant to the subject treated in the feature articles by J.-M. Mienville and G. Meyer et al. Courtesy of Neil R. Smalheiser, Department of Psychiatry, University of Illinois at Chicago.
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