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Dendrites pp 181–211Cite as

Tiling and Mosaic Spacing of Dendrites

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Abstract

Dendrites exhibit a diverse array of complex but often stereotyped morphologies that influence the inputs a neuron can receive and how these inputs are processed. While dendrite morphology is a hallmark of neuronal type, with neurons of a given type elaborating type-specific dendrite arbors, certain organizing principles govern patterning and spacing of dendrite and axon arbors. In many cases, particularly in sensory systems, dendrites of same-type neurons are arranged in ordered mosaics. In some of these mosaics, neurites of a single functional class of neurons are arranged to allow complete and nonredundant representation of territory – a phenomenon referred to as tiling. Tiling dendrites (and axons) minimally overlap with dendrites of the same functional class, but freely overlap with dendrites of different neurons, therefore tiling dendrites must be able to recognize and avoid “self”-dendrites while coexisting with “nonself”-dendrites. Tiled mosaics have been observed in non-neuronal cells as well, suggesting that tiling is a general mechanism for cell spacing. Here I will provide an overview of the cellular mechanism of tiling in neurons, with a focus on studies in model systems that have provided information about signaling systems underlying the establishment and maintenance of tiled mosaics.

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Acknowledgments

I would like to thank Akira Chiba, Nan Jiang, Wen-Yang Lin, David Miller, Alvaro Sagasti, and Rachel Wong for contributing unpublished images. Thanks also to Peter Soba and Michael Kim for helpful discussions. This work was supported by National Institutes of Health grant NINDS R01-NS076614.

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Correspondence to Jay Z. Parrish .

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© 2016 Springer Japan

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Parrish, J.Z. (2016). Tiling and Mosaic Spacing of Dendrites. In: Emoto, K., Wong, R., Huang, E., Hoogenraad, C. (eds) Dendrites. Springer, Tokyo. https://doi.org/10.1007/978-4-431-56050-0_9

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