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Three-Dimensional Analysis of Spiny Dendrites Using Straightening and Unrolling Transforms

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Abstract

Current understanding of the synaptic organization of the brain depends to a large extent on knowledge about the synaptic inputs to the neurons. Indeed, the dendritic surfaces of pyramidal cells (the most common neuron in the cerebral cortex) are covered by thin protrusions named dendritic spines. These represent the targets of most excitatory synapses in the cerebral cortex and therefore, dendritic spines prove critical in learning, memory and cognition. This paper presents a new method that facilitates the analysis of the 3D structure of spine insertions in dendrites, providing insight on spine distribution patterns. This method is based both on the implementation of straightening and unrolling transformations to move the analysis process to a planar, unfolded arrangement, and on the design of DISPINE, an interactive environment that supports the visual analysis of 3D patterns.

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Notes

  1. The dendrite’s sheath medial axis is a simplified representation that is manually created; it is actually a polyline whose vertices are markers which store the tangent unit vector.

  2. For example, the morphology, number and density of dendritic spines are altered in many brain diseases and under several conditions such as malnutrition, alcohol or toxin exposure (Fiala et al. 2002).

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Acknowledgements

This work was supported by grants from the following entities: Centre for Networked Biomedical Research into Neurodegenerative Diseases (CIBERNED, CB06/05/0066) and the Spanish Ministry of Education, Science and Innovation (grants BFU2006-13395; SAF2009-09394 to Javier DeFelipe; TIN2010-21289 and the Cajal Blue Brain Project, Spanish partner of the Blue Brain Project initiative from EPFL).

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Correspondence to Angel Rodríguez.

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Morales, J., Benavides-Piccione, R., Rodríguez, A. et al. Three-Dimensional Analysis of Spiny Dendrites Using Straightening and Unrolling Transforms. Neuroinform 10, 391–407 (2012). https://doi.org/10.1007/s12021-012-9153-2

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  • DOI: https://doi.org/10.1007/s12021-012-9153-2

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