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Comparing basal dendrite branches in human and mouse hippocampal CA1 pyramidal neurons with Bayesian networks

AuthorsMihaljević, Bojan; Larrañaga, Pedro; Benavides-Piccione, Ruth CSIC ORCID; DeFelipe, Javier; Bielza, Concha
Issue Date2020
PublisherNature Publishing Group
CitationScientific Reports 10 (2020)
AbstractPyramidal neurons are the most common cell type in the cerebral cortex. Understanding how they differ between species is a key challenge in neuroscience. A recent study provided a unique set of human and mouse pyramidal neurons of the CA1 region of the hippocampus, and used it to compare the morphology of apical and basal dendritic branches of the two species. The study found inter-species differences in the magnitude of the morphometrics and similarities regarding their variation with respect to morphological determinants such as branch type and branch order. We use the same data set to perform additional comparisons of basal dendrites. In order to isolate the heterogeneity due to intrinsic differences between species from the heterogeneity due to differences in morphological determinants, we fit multivariate models over the morphometrics and the determinants. In particular, we use conditional linear Gaussian Bayesian networks, which provide a concise graphical representation of the independencies and correlations among the variables. We also extend the previous study by considering additional morphometrics and by formally testing whether a morphometric increases or decreases with the distance from the soma. This study introduces a multivariate methodology for inter-species comparison of morphology.
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Identifiersdoi: 10.1038/s41598-020-73617-9
issn: 2045-2322
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