Previous studies found significant modification in spatiotemporal parameters of backward walking in healthy older adults, but the age-related changes in the neuromuscular control have been considered to a lesser extent. The present study compared the intersegmental coordination, muscle activity and corresponding modifications of spinal montoneuronal output during both forward and backward walking in young and older adults. Ten older and ten young adults walked forward and backward on a treadmill at different speeds. Gait kinematics and EMG activity of 14 unilateral lower-limb muscles were recorded. As compared to young adults, the older ones used shorter steps, a more in-phase shank and foot motion, and the activity profiles of muscles innervated from the sacral segments were significantly wider in each walking condition. These findings highlight age-related changes in the neuromuscular control of both forward and backward walking. A striking feature of backward walking was the differential organization of the spinal output as compared to forward gait. In addition, the resulting spatiotemporal map patterns also characterized age-related changes of gait. Finally, modifications of the intersegmental coordination with aging were greater during backward walking. On the whole, the assessment of backward walk in addition to routine forward walk may help identifying or unmasking neuromuscular adjustments of gait to aging.

Dewolf, A.h., Sylos-Labini, F., Cappellini, G., Ivanenko, Y., Lacquaniti, F. (2021). Age-related changes in the neuromuscular control of forward and backward locomotion. PLOS ONE, 16(2), 1-18 [10.1371/journal.pone.0246372].

Age-related changes in the neuromuscular control of forward and backward locomotion

Sylos-Labini, Francesca;Lacquaniti, Francesco
Conceptualization
2021-01-01

Abstract

Previous studies found significant modification in spatiotemporal parameters of backward walking in healthy older adults, but the age-related changes in the neuromuscular control have been considered to a lesser extent. The present study compared the intersegmental coordination, muscle activity and corresponding modifications of spinal montoneuronal output during both forward and backward walking in young and older adults. Ten older and ten young adults walked forward and backward on a treadmill at different speeds. Gait kinematics and EMG activity of 14 unilateral lower-limb muscles were recorded. As compared to young adults, the older ones used shorter steps, a more in-phase shank and foot motion, and the activity profiles of muscles innervated from the sacral segments were significantly wider in each walking condition. These findings highlight age-related changes in the neuromuscular control of both forward and backward walking. A striking feature of backward walking was the differential organization of the spinal output as compared to forward gait. In addition, the resulting spatiotemporal map patterns also characterized age-related changes of gait. Finally, modifications of the intersegmental coordination with aging were greater during backward walking. On the whole, the assessment of backward walk in addition to routine forward walk may help identifying or unmasking neuromuscular adjustments of gait to aging.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/09
English
Adult
Aged
Biomechanical Phenomena
Exercise Test
Female
Humans
Male
Young Adult
Aging
Gait
Walking
Dewolf, A.h., Sylos-Labini, F., Cappellini, G., Ivanenko, Y., Lacquaniti, F. (2021). Age-related changes in the neuromuscular control of forward and backward locomotion. PLOS ONE, 16(2), 1-18 [10.1371/journal.pone.0246372].
Dewolf, Ah; Sylos-Labini, F; Cappellini, G; Ivanenko, Y; Lacquaniti, F
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
Dewolf_elderly_FWBWgait_PlosONE2021.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 1.7 MB
Formato Adobe PDF
1.7 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/308635
Citazioni
  • ???jsp.display-item.citation.pmc??? 6
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 7
social impact