{"id":695,"date":"2024-02-01T17:11:00","date_gmt":"2024-02-01T20:11:00","guid":{"rendered":"https:\/\/ingenieria.uner.edu.ar\/nucleos\/movimiento_humano\/?p=695"},"modified":"2025-09-16T15:49:16","modified_gmt":"2025-09-16T18:49:16","slug":"smartphone-use-affects-spatio-temporalgait-parameters-but-not-gait-symmetry-inyoung-adults-walking-outdoors","status":"publish","type":"post","link":"https:\/\/ingenieria.uner.edu.ar\/nucleos\/movimiento_humano\/index.php\/2024\/02\/01\/smartphone-use-affects-spatio-temporalgait-parameters-but-not-gait-symmetry-inyoung-adults-walking-outdoors\/","title":{"rendered":"Selective Dorsal Rhizotomy and its Effect on Muscle Force during Walking: A Comprehensive Study"},"content":{"rendered":"\n

Emilio Pablo Ravera, Adam Rozumalsky<\/h3>\n\n\n\n

Publicado: Junio, 2024<\/h5>\n\n\n\n

Abstract<\/h4>\n\n\n\n

\u200bSelective dorsal rhizotomy (SDR) is commonly used to permanently reduce spas\u200bticity in children with cerebral palsy (CP). However, studies have yielded varying\u200b\u00a0results regarding muscle strength and activity after SDR. Some studies indicate\u200b\u00a0weakness or no changes, while a recent study using NMSK simulations demonstrates improvements in muscle forces during walking. These findings suggest\u200b\u00a0that SDR may alleviate spasticity, reducing dynamic muscle constraints and enhancing muscle force without altering muscle activity during walking in children\u200b\u00a0with CP.<\/p>\n\n\n\n

In this study, we combined NMSK simulations with physical examinations to assess children with CP who underwent SDR, comparing them to well-matched peers who did not undergo the procedure. Each group (SDR and No-SDR) included 81 children, with pre- and post-SDR assessments. Both groups were\u200b\u00a0well-matched in terms of demographics, clinical characteristics, and gait parameters.<\/p>\n\n\n\n

The results of the physical examination indicate that SDR significantly reduces spasticity without impacting muscle strength. Furthermore, our findings\u200b\u00a0show no significant differences in gait deviation index improvements and walking speed between the two groups. Additionally, there were no statistically significant changes in muscle activity during walking before and after SDR for both groups. NMSK results demonstrate a significant increase in muscle force in the semimembranosus and calf muscles during walking, compared to children with CP who received other clinical treatments. Our findings confirm that although SDR does not significantly impact muscle strength compared to other treatments, it creates a more favorable dynamic enviroment for suboptimal muscle force production, which is essentia for walking.<\/p>\n\n\n\n

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Figure 2. Mean of hip, knee and ankle moments for the corresponding group. Joint moments were obtained by OpenSim inverse dynamic tool. Standard deviation of unimpaired children (from Schwartz et al. (2008)) was included as gray area.<\/figcaption><\/figure>\n\n\n\n

Keywords<\/h4>\n\n\n\n