A comparison of partial information decompositions using data from real and simulated layer 5b pyramidal cells

Kay, J. W. , Schulz, J. M. and Phillips, W. A. (2022) A comparison of partial information decompositions using data from real and simulated layer 5b pyramidal cells. Entropy, 24(8), 1021. (doi: 10.3390/e24081021)

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Partial information decomposition allows the joint mutual information between an output and a set of inputs to be divided into components that are synergistic or shared or unique to each input. We consider five different decompositions and compare their results using data from layer 5b pyramidal cells in two different studies. The first study was on the amplification of somatic action potential output by apical dendritic input and its regulation by dendritic inhibition. We find that two of the decompositions produce much larger estimates of synergy and shared information than the others, as well as large levels of unique misinformation. When within-neuron differences in the components are examined, the five methods produce more similar results for all but the shared information component, for which two methods produce a different statistical conclusion from the others. There are some differences in the expression of unique information asymmetry among the methods. It is significantly larger, on average, under dendritic inhibition. Three of the methods support a previous conclusion that apical amplification is reduced by dendritic inhibition. The second study used a detailed compartmental model to produce action potentials for many combinations of the numbers of basal and apical synaptic inputs. Decompositions of the entire data set produce similar differences to those in the first study. Two analyses of decompositions are conducted on subsets of the data. In the first, the decompositions reveal a bifurcation in unique information asymmetry. For three of the methods, this suggests that apical drive switches to basal drive as the strength of the basal input increases, while the other two show changing mixtures of information and misinformation. Decompositions produced using the second set of subsets show that all five decompositions provide support for properties of cooperative context-sensitivity—to varying extents.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Kay, Dr James
Creator Roles:
Kay, J. W.Conceptualization, Methodology, Software, Validation, Formal analysis, Writing – original draft, Writing – review and editing, Visualization
Authors: Kay, J. W., Schulz, J. M., and Phillips, W. A.
College/School:College of Science and Engineering > School of Mathematics and Statistics
Journal Name:Entropy
ISSN (Online):1099-4300
Published Online:24 July 2022
Copyright Holders:Copyright © 2022 by the authors.
First Published:First published in Entropy 24(8):1021
Publisher Policy:Reproduced under a Creative Commons Licence

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