Bilateral synergy as an index of force coordination in chronic stroke.
Exp Brain Res
; 235(5): 1501-1509, 2017 05.
Article
de En
| MEDLINE
| ID: mdl-28246971
ABSTRACT
Dysfunction in bilateral coordination post-stroke is responsible for impaired bilateral movements. This study examined bilateral synergies using the uncontrolled manifold (UCM) approach while individuals in a chronic stage after stroke executed bilateral isometric force control at three submaximal force levels. Nine patients with stroke and nine age-matched healthy controls performed 24 trials of wrist and fingers extension at 5, 25, and 50% of MVC. The UCM findings revealed (a) decreased bilateral synergies in patients with stroke as compared to controls at 50% of MVC and (b) reduced good variability and increased bad variability components in patients with stroke at 50% of MVC. Moreover, correlation analyses across both groups showed that a reduction of bilateral synergies was related to increased force error at 50% of MVC and an inconsistent force ratio between the two hands across multiple trials correlated with increased good and bad variability at 5% of MVC. Current findings indicate that quantifying bilateral synergies may provide meaningful profiles for estimating impairments as well as improvements of cooperative behaviors between two hands post-stroke.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Troubles psychomoteurs
/
Accident vasculaire cérébral
/
Membre supérieur
/
Doigts
/
Latéralité fonctionnelle
Type d'étude:
Observational_studies
/
Risk_factors_studies
Limites:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Langue:
En
Journal:
Exp Brain Res
Année:
2017
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique