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REVIEW

Synaptic Plasticity In Vitro and In Silico: Insights into an Intracellular Signaling Maze

Sriram M. Ajay¹ and Upinder S. Bhalla²

¹ Temasek Life Sciences Laboratory, Singapore; and
² National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India bhalla{at}ncbs.res.in

Synaptic plasticity provides a record of neuronal activity and is a likely basis for memory. The early apparent simplicity of the process of synaptic plasticity has been lost in a flood of experimental data that now implicates some 200 signaling molecules in cellular memory. It is now clear that these signaling networks perform surprisingly sophisticated cellular decisions that weigh factors such as input patterns, location of stimulus, history of activity, and context. Computer models have followed experiments into this maze of molecular detail, often matching closely with their experimental counterparts, but perhaps losing simplicity in the process. Here, we suggest that the merger of models and experiment have begun to restore the earlier simplicity by outlining a few key functional roles for signaling networks in synaptic plasticity. In this review, we discuss the current state of understanding of synaptic plasticity in terms of models and experiments.