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Titre : | Position-Dependent, Hyperexcitable Patellar Reflex Dynamics in Chronic Stroke (2013) |
Auteurs : | Chung-Yong Yang ; Xin Guo ; Yupeng Ren ; et al. |
Type de document : | Article |
Dans : | Archives of Physical Medicine and Rehabilitation (2013/2, 2013) |
Article en page(s) : | pp. 391-400 |
Langues: | Anglais |
Descripteurs : |
HE Vinci Accident vasculaire cérébral (AVC) ; Rééducation et réadaptation |
Mots-clés: | Muscle spasticity ; Spasticité musculaire ; Reflex ; Stretch ; Réflexe d'étirement ; Stroke |
Résumé : |
"Objectives To quantify tendon tap response (TTR) properties and their position dependence using multiple neuromechanical parameters, and to analyze correlations among neuromechanical and clinical measures. Design Hyperexcitable dynamics of TTR were investigated in a case-control manner. An instrumented hammer was used to induce the patellar deep tendon reflex (DTR), with reflex-mediated electromyography and torque responses measured across a range of knee flexion. Setting Research laboratory in a rehabilitation hospital. Participants Chronic hemiplegic stroke survivors (n=9) and healthy subjects (n=13). Interventions Not applicable. Main Outcome Measures Neuromechanical measures (system gain, contraction rate, half-relaxation rate, reflex loop delay, peak reflex torque, peak reflex electromyography, and reflex threshold in tapping force) were measured to characterize neuromuscular properties of patellar TTR. Clinical measurements were taken using the DTR scale and the Modified Ashworth Scale. Results The system gain, contraction rate, half-relaxation rate, and peak reflex-mediated torque in the stroke group were generally higher, whereas the reflex threshold in the stroke group was significantly lower than their counterparts in the control group across 45° to 90° of knee flexion (P<.05 the parameters were significantly higher at and of flexion than their correlations with clinical scales also those> Conclusions The results showed hyperexcitability of TTR in stroke, quantified using a number of neuromechanical measures. Those measures peak around 60° to 75° of knee flexion and were correlated with clinical scales." |
Disponible en ligne : | Oui |
En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.sciencedirect.com/journal/archives-of-physical-medicine-and-rehabilitation |