Conclusions : Age-related differences support the impact of stroke-related sarcopenia as a contributor to hemiparetic muscle dysfunction .
Abstract Background : Despite extensive study of the impact of stroke on muscle and functional performance , questions remain regarding the extent to which changes are due to the neurological injury vs. age-related loss of morphology and force production .
Objectives : To synthesize available evidence describing post-stroke changes in lower extremity muscle size and strength compared to healthy adults .
Association between ultrasound measurements of muscle thickness, pennation angle, echogenicity and skeletal muscle strength in the elderly
The increase of elderly in our society requires simple tools for quantification of sarcopenia in inpatient and outpatient setting s. The aim of this study was to compare parameters determined with musculoskeletal ultrasound ( M-US ) with muscle strength in young and elderly patients . In this prospect i ve , r and omised and observer blind study , 26 young ( 24.2 ± 3.7 years ) and 26 old ( age 67.8 ± 4.8 years ) patients were included . Muscle thickness , pennation angle and echogenicity of all muscles of musculus quadriceps were measured by M-US and correlated with isometric maximum voluntary contraction force ( MVC ) of musculus quadriceps . Reproducibility of M-US measurements as well as simple and multiple regression models were calculated . Of all measured M-US variables the highest reproducibility was found for measurements of thickness ( intraclass correlation coefficients , 85–97 % ) . Simple regression analysis showed a highly significant correlation of thickness measurements of all muscles of musculus quadriceps with MVC in the elderly and in the young . Multiple regression analysis revealed that thickness of musculus vastus medialis had the best correlation with MVC in the elderly . This study showed that measurement of muscle thickness , especially of musculus vastus medialis , by M-US is a reliable , bedside method for monitoring the extent of sarcopenia
Conclusions : Age-related differences support the impact of stroke-related sarcopenia as a contributor to hemiparetic muscle dysfunction .
Abstract Background : Despite extensive study of the impact of stroke on muscle and functional performance , questions remain regarding the extent to which changes are due to the neurological injury vs. age-related loss of morphology and force production .
Objectives : To synthesize available evidence describing post-stroke changes in lower extremity muscle size and strength compared to healthy adults .