Complexity Matching: Restoring the Complexity of Locomotion in Older People Through Arm-in-Arm Walking

Abstract : The complexity matching effect refers to a maximization of information exchange, when interacting systems share similar complexities. Additionally, interacting systems tend to attune their complexities in order to enhance their coordination. This effect has been observed in a number of synchronization experiments, and interpreted as a transfer of multifractality between systems. Finally, it has been shown that when two systems of different complexity levels interact, this transfer of multifractality operates from the most complex system to the less complex, yielding an increase of complexity in the latter. This theoretical framework inspired the present experiment that tested the possible restoration of complexity in older people. In young and healthy participants, walking is known to present 1/f fluctuations, reflecting the complexity of the locomotion system, providing walkers with both stability and adaptability. In contrast walking tends to present a more disordered dynamics in older people, and this whitening was shown to correlate with fall propensity. We hypothesized that if an aged participant walked in close synchrony with a young companion, the complexity matching effect should result in the restoration of complexity in the former. Older participants were involved in a prolonged training program of synchronized walking, with a young experimenter. Synchronization within the dyads was dominated by complexity matching. We observed a restoration of complexity in participants after 3 weeks, and this effect was persistent 2 weeks after the end of the training session. This work presents the first demonstration of a restoration of complexity in deficient systems.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [38 références]  Voir  Masquer  Télécharger

https://hal.umontpellier.fr/hal-02309596
Contributeur : Anthony Herrada <>
Soumis le : mercredi 9 octobre 2019 - 13:54:40
Dernière modification le : jeudi 10 octobre 2019 - 01:20:43

Fichier

fphys-09-01766.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Zainy Almurad, Clément Roume, Hubert Blain, Didier Delignieres. Complexity Matching: Restoring the Complexity of Locomotion in Older People Through Arm-in-Arm Walking. Frontiers in Physiology, Frontiers, 2018, 9, pp.1766. ⟨10.3389/fphys.2018.01766⟩. ⟨hal-02309596⟩

Partager

Métriques

Consultations de la notice

11

Téléchargements de fichiers

15