Avaliação dos parâmetros funcionais, biomecânicos e eletromiográficos em portadores da síndrome da dor femoropatelar

Abstract

Introduction: Patellofemoral pain syndrome (PFPS) is a condition that affects young women and it can contribute to lower limb functionality reduction. However, while some studies demonstrate functional alterations related to this syndrome, others do not find this difference between individuals with and without this condition. Objectives: To evaluate and compare the level of pain and functionality, muscular recruitment, joint position sense and dynamic postural control between young women with and without PFPS. Metodologia: 12 women with PFPS (21.67 ± 2.49 of age) and 12 controls (21.25 ± 2.01) participated in this study. Self-perceived knee functionality was assessed by Lysholm Knee Scoring Scale and the level of pain by Visual Analogue Scale (VAS). Electromyography (EMG) evaluated lateral gastrocnemius, soleus (SO), tibialis anterior, vastus medialis oblique (VMO), vastus medialis longus, vastus lateralis (VL) and bíceps femoris muscles during stair ascent and descent of different heights (5 e 15cm), the results was analyzed in 3 phases. Joint position sense was assessed by electrogoniometer and dynamic postural control was assessed by the Star Excursion Balance Test (SEBT).. Statistic analyzes compared the two groups by student t for independent samples and Mann-Whitney tests. The results are expressed as mean ± standard deviation. Results: There was difference (p<0,001) between groups in VAS (SDFP: 5,08 ± 1,98, GC: 0 ± 0,0;) and Lysholm Scale (GC: 99,62 ± 1,38, SDFP: 68,33 ± 16,08). Just the phase 1 (p=0,041) and 3 (p=0,035) of soleus muscle showed difference during descent of 5cm step. Phase 2 of VL (p=0,020), 3 of VMO (p=0,005) and VL (p=0,016) also showed difference during ascent of 15 cm step. There was no difference (p>0,05) between groups in joint position sense and SEBT. Conclusion: Women with PFPS report higher pain and lower knee functionality than controls. However, they do not demonstrate altered joint position sense and dynamic postural control, and could need of higher quadriceps recruitment during stair ascent.