Ontology type: schema:ScholarlyArticle
2004-02-01
AUTHORSCristopher M Niell, Martin P Meyer, Stephen J Smith
ABSTRACTThe form of a neuron's dendritic arbor determines the set of axons with which it may form synaptic contacts, thus establishing connectivity within neural circuits. However, the dynamic relationship between dendrite growth and synaptogenesis is not well understood. To observe both processes simultaneously, we performed long-term imaging of non-spiny dendritic arbors expressing a fluorescent postsynaptic marker protein as they arborized within the optic tectum of live zebrafish larvae. Our results indicate that almost all synapses form initially on newly extended dendritic filopodia. A fraction of these nascent synapses are maintained, which in turn stabilizes the subset of filopodia on which they form. Stabilized filopodia mature into dendritic branches, and successive iterations of this process result in growth and branching of the arbor. These findings support a 'synaptotropic model' in which synapse formation can direct dendrite arborization. More... »
PAGES254-260
http://scigraph.springernature.com/pub.10.1038/nn1191
DOIhttp://dx.doi.org/10.1038/nn1191
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