Studying the role of axon fasciculation during development in a computational model of the Xenopus tadpole spinal cord.

Abstract:

:During nervous system development growing axons can interact with each other, for example by adhering together in order to produce bundles (fasciculation). How does such axon-axon interaction affect the resulting axonal trajectories, and what are the possible benefits of this process in terms of network function? In this paper we study these questions by adapting an existing computational model of the development of neurons in the Xenopus tadpole spinal cord to include interactions between axons. We demonstrate that even relatively weak attraction causes bundles to appear, while if axons weakly repulse each other their trajectories diverge such that they fill the available space. We show how fasciculation can help to ensure axons grow in the correct location for proper network formation when normal growth barriers contain gaps, and use a functional spiking model to show that fasciculation allows the network to generate reliable swimming behaviour even when overall synapse counts are artificially lowered. Although we study fasciculation in one particular organism, our approach to modelling axon growth is general and can be widely applied to study other nervous systems.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Davis O,Merrison-Hort R,Soffe SR,Borisyuk R

doi

10.1038/s41598-017-13804-3

subject

Has Abstract

pub_date

2017-10-19 00:00:00

pages

13551

issue

1

issn

2045-2322

pii

10.1038/s41598-017-13804-3

journal_volume

7

pub_type

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