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. 2018 Dec 3;9:1714. doi: 10.3389/fphys.2018.01714

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Copyright © 2018 Loppini, Gizzi, Ruiz-Baier, Cherubini, Fenton and Filippi.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Clockwise (blue) and counterclockwise (red) tip trajectories obtained in a dynamic uniaxially stretched case with MEF parameters D₁ = 0, G_s = 0.125 and initiated via the S1-S2 stimulation protocol. (B) Counterclockwise spiral initiation from top (red) or bottom (blue) boundary. Side panels show progressive spiral frames for the two cases.