Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2018-10-10T14:12:31Z No. of bitstreams: 1 barbarapalmeirarossi.pdf: 2217094 bytes, checksum: 480750f65d038294f2e4a6574e13bcd7 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-10-16T13:34:50Z (GMT) No. of bitstreams: 1 barbarapalmeirarossi.pdf: 2217094 bytes, checksum: 480750f65d038294f2e4a6574e13bcd7 (MD5) / Made available in DSpace on 2018-10-16T13:34:50Z (GMT). No. of bitstreams: 1 barbarapalmeirarossi.pdf: 2217094 bytes, checksum: 480750f65d038294f2e4a6574e13bcd7 (MD5) Previous issue date: 2018-08-20 / INTRODUÇÃO: A escoliose idiopática (EI) é a maior causa de deformidade na coluna de adolescentes. A eletromiografia de superfície (EMGs) tem sido considerada um instrumento válido para avaliação da ativação elétrica entre os músculos paravertebrais, entretanto poucos autores se dedicaram a estudar a ativação dos músculos longuíssimo lombar (Long), iliocostal (Ilio) e glúteo médio (Gme), durante atividades dinâmicas. OBJETIVO: Avaliar a ativação elétrica dos músculos Long, Ilio e Gme, nos lados côncavo (Cv) e convexo (Cx) da coluna lombar de adolescentes com EI, durante os movimentos de levantar, sentar e durante a marcha além de correlacionar essa ativação com o ângulo de Cobb. MÉTODOS: Trata-se de um estudo transversal, aprovado pelo CEP/UFJF (Parecer nº 2.253.351) no qual foram avaliados 15 adolescentes, destros, diagnosticados por meio de raio-X para medida de ângulo de Cobb com EI lombar entre 10 e 32º. A atividade muscular foi avaliada por meio da EMGs (EMGSystem®), sendo que os eletrodos de superfície foram colocados sobre os músculos Long, Ilio e Gme. Um footswitch foi posicionado sob o calcâneo para marcação temporal juntamente com a EMGs, com sinais captados durante 1 min. Os sinais foram processados com MATLAB e calculada a amplitude RMS. RESULTADOS: Houve diferença significativa entre as amplitudes RMS nos lados Cv e Cx, no Long, durante o movimento de levantar (P=0,026), sentar (P=0,015) e na marcha, no início da fase de apoio (P=0,007). No Ilio do lado Cx pode-se observar correlação com o ângulo de Cobb, durante o movimento de levantar (P=0,003, r=0,71) e sentar (P=0,03, r=0,55). CONCLUSAO: Existe assimetria no recrutamento do Long nos movimentos de levantar, sentar e durante a marcha. Além disso, pode-se observar correlação entre o Ilio do lado Cx e o ângulo de Cobb. / INTRODUCTION: Idiopathic scoliosis (IS) is the major cause of deformity in the adolescent spine. Surface electromyography (sEMG) has been considered a valid instrument for the evaluation of electrical activation among the paravertebral muscles. However, a few authors have studied the muscles activation of the Longissimus lumbar (Long), Iliocostalis (Ilio) and Gluteus Medius (Gme) during dynamic activities. OBJECTIVE: To evaluate the electrical activation of the Long, Ilio and Gme muscles on the concave (Cv) and convex (Cx) sides of the adolescents lumbar spine with IS during the standing, sitting and walking movements and to correlate this activation with the Cobb angle. METHODS: A cross-sectional study was performed in 15 adolescents, right-handed, diagnosed by means of x-ray to measure Cobb angle with lumbar IS between 10 and 32º. EMGs were recorded using surface electrodes placed on Long, Ilio and Gme muscles. The footswitch was placed under the calcaneus for temporal marking in parallel with the EMGs for 1 min. The signals were processed in MATLAB and the RMS amplitude was estimated. RESULTS: There was a significant difference between the Cv and Cx sides, in the Long muscles during the standing movement (P=0.026) and during sitting movement (P=0.015). On gait, there was a significant difference in Long, at the beginning of the support phase (P=0.007). Ilio muscle on the Cx side presented a correlation with the Cobb angle, during standing (P=0.003, r=0.71) and sitting (P=0.03, r=0.55). CONCLUSION: There seems to be an asymmetry in Long muscle recruitment during standing and sitting, and at the beginning of the support phase. In addition, the Ilio correlates with the Cobb angle during standing and sitting.

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La première cause de handicap neurologique chez l’adulte en France est l’accident vasculaire cérébral (AVC). L’AVC est la principale cause de l’hémiplégie et peut conduire à des séquelles lourdes telles que des difficultés à se lever et s’asseoir. A ce jour, il n’existe pas de dispositif d’aide au passage assis-debout (PAD)/debout-assis (PDA) permettant le déplacement en position debout adapté aux sujets hémiplégiques.La conception de ce type de dispositif est l’objectif du projet VHIPOD. L’absence d’études sur le PAD/PDA avec aide des sujets hémiplégiques invite à explorer deux types d’aides : ancrage fixe et ancrage mobile. Une première campagne d’expérimentation a permis de mesurer le PAD/PDA de 18 sujets sains et 11 sujets hémiplégiques droits dans différentes conditions : avec/sans ancrage fixe, avec/sans écharpe d’immobilisation et pour différentes positions de l’ancrage fixe. Ce travail a permis de montrer la contribution d’un ancrage fixe sur le PAD/PDA (ex. réduction des moments articulaires aux genoux) et de montrer que la position de l’ancrage fixe influence le PAD/PDA (ex. une position du côté gauche/sain augmente l’appui sur le membre inférieur gauche). Une deuxième campagne d’expérimentation a permis de mesurer le PAD/PDA avec ancrage mobile de 7 sujets sains et 10 sujets hémiplégiques gauches. Ce travail a permis d’identifier la différence entre les sujets hémiplégiques et les sujets sains (ex. les sujets hémiplégiques gauches sont plus asymétriques que les sujets sains) et de comparer les résultats du PAD/PDA avec ancrage mobile à ceux du PAD/PDA avec ancrage fixe (ex. l’asymétrie des sujets hémiplégiques est augmentée pour le PAD/PDA avec ancrage mobile. / Stroke is the first cause of neurological handicap for adults in France. It is the principal cause of hemiplegia and could lead to major consequences as to have difficulties to stand up, to sit down or even to walk/move.Nowadays, there’s no device adapted to assist hemiplegic persons to stand up, to move while standing up and to sit down. The creation of this type of device/vehicle is the aim of VHIPOD project. The absence of studies on the assisted sit-to-stand (STS) for hemiplegic persons invites to investigate two type of assistance : fixed anchor and moving anchor. Two series of experimentation have been conducted. The first experimental device allowed the sit-to-stand/stand-to-sit measurements for 18 healthy subjects and11 right hemiplegic subjects in different conditions : with/without a fixed anchor, with/without an arm sling and for different anchor position. The analysis of the results showed the contribution of a fixed handgrip (ex. reduction of the knee joint moments) and the influence of the handgrip position on the movement (ex. a position on the left/healthy side increases the effort on left lower limb.). The second experimental device allowed the sit-to-stand/stand-to-sit measurements for 7 healthy subjects and 10 left hemiplegic subjects. The analysis of the results allowed us to describe the sit-to-stand/stand-to-sit with moving anchor, to compare the two populations (ex. Left hemiplegic subjects have a more asymmetrical movement then healthy subjects) and to compare the STS with moving anchor to the STS with fixed anchor (ex. The asymmetry of hemiplegic subjects was higher for the STS with a moving anchor).