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Titre : | Passive Mechanical Properties of Gastrocnemius Muscles of People With Ankle Contracture After Stroke (2012) |
Auteurs : | Kwah li khim ; Robert Herbert ; Lisa Harvey ; et al. |
Type de document : | Article |
Dans : | Archives of Physical Medicine and Rehabilitation (2012/7, 2012) |
Article en page(s) : | pp. 1185-1190 |
Langues: | Anglais |
Descripteurs : |
HE Vinci Accident vasculaire cérébral (AVC) ; Cheville ; Rééducation et réadaptation |
Mots-clés: | Ankle ; Stroke ; Contracture ; Muscles ; skeletal ; Muscles squelettiques |
Résumé : |
Objective To investigate the mechanisms of contracture after stroke by comparing passive mechanical properties of gastrocnemius muscle-tendon units, muscle fascicles, and tendons in people with ankle contracture after stroke with control participants. Design Cross-sectional study. Setting Laboratory in a research institution. Participants A convenience sample of people with ankle contracture after stroke (n=20) and able-bodied control subjects (n=30). Interventions Not applicable. Main Outcome Measures Stiffness and lengths of gastrocnemius muscle-tendon units, lengths of muscle fascicles, and tendons at specific tensions. Results At a tension of 100N, the gastrocnemius muscle-tendon unit was significantly shorter in participants with stroke (mean, 436mm) than in able-bodied control participants (mean, 444mm; difference, 8mm; 95% confidence interval [CI], 0.215mm; P=.04). Muscle fascicles were also shorter in the stroke group (mean, 44mm) than in the control group (mean, 50mm; difference, 6mm; 95% CI, 112mm; P=.03). There were no significant differences between groups in the mean stiffness or length of the muscle-tendon units and fascicles at low tension, or in the mean length of the tendons at any tension. Conclusions People with ankle contracture after stroke have shorter gastrocnemius muscle-tendon units and muscle fascicles than control participants at high tension. This difference is not apparent at low tension. |
Disponible en ligne : | Oui |
En ligne : | http://www.archives-pmr.org/article/S0003-9993%2812%2900102-5/abstract |