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Social animals vary in their ability to compete with group members over shared resources and also vary in their cooperative efforts to produce these resources. Competition among groups can promote within‐group cooperation, but many existing models of intergroup cooperation do not explicitly account for observations that group members invest differentially in cooperation and that there are often within‐group...
Using in situ patch-clamp techniques, we have studied K current expression in rat telencephalon from embryonic day 12 to 21. For cells recorded in the ventricular zone, the K current consisted of a delayed rectifier and a large-conductance calcium-activated component, and displayed little variation from embryonic day 12 to 21. Cells recorded in pial regions could be separated into two classes: radially...
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