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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The Impact of Manual-assisted Locomotor Training on Walking Ability and Sensory and Motor Scores in Chronic Motor Incomplete Spinal Cord Injury

Buehner, Jeffrey J. 16 December 2010 (has links)
No description available.
2

Respostas motoras durante a marcha com suporte de peso corporal na esteira em diferentes velocidades em indivíduos com lesão medular / Motor responses during body weight support treadmill gait at different speeds in individuals with spinal cord injury

Padula, Natalia 14 March 2018 (has links)
A Lesão Medular (LM) afeta a funcionalidade do indivíduo e pode reduzir drasticamente a independência. A restauração da mobilidade e do andar, é uma das principais metas das intervenções na população com LM, e nesse contexto o treinamento locomotor (TLSP) é uma intervenção utilizada com objetivo de fornecer estímulos sensoriais específicos ao sistema nervoso danificado para estimular as redes e circuitos preservados da medula. A velocidade é uma aferência sensorial importante durante o TLSP em esteira. Objetivo: investigar o efeito da variação de velocidade sobre as respostas motoras de indivíduos com lesões medulares durante TLSP em esteira. Método: 20 sujeitos sem LM denominado de grupo controle (GC) e 13 com LM completa (GLM) foram submetidos ao protocolo TLSP em esteira nas velocidades 2, 3 e 4 km/h. Foi realizada uma análise de EMG para avaliar atividade muscular de vasto lateral (VL), bíceps femural (BF), tibial anterior (TA) e gastrocnêmio lateral (GL) ao longo do ciclo do passo. Resultados: O GC apresentou maior atividade muscular distal TA e GL quando comparado ao GLM com maior atividade proximal VL e BF durante todas as fases da marcha. A velocidade que apresentou maior atividade muscular foi a intermediária (3km/h), quando comparado as velocidades 2Km/h e 4km/h. O aumento da velocidade resultou em maior influência nos músculos distais. Conclusão: a velocidade pode influenciar nas respostas motoras locomotoras de indivíduos com LM. O aumento da velocidade teve um papel importante no aumento da atividade muscular, contudo a atividade muscular foi maior na velocidade intermediária (3km/h) / Spinal Cord Injury (SCI) affects the individual\'s functionality and can gradually reduce independence. The restoration of mobility and walking, is one of the main goals of the interventions in SCI population. In this context body weight support treadmill training (BWSTT) is an intervention used to provide specific sensory stimuli to the damaged nervous system to stimulate the networks and circuits preserved in the spinal cord. Velocity is an important sensory afferment during the BWSTT. Objective: to investigate the effect of speed variation on motor responses of use with spinal cord injuries BWSTTl. Method: 20 healthy subjects composed the control group (CG) and 13 with complete SCI (SCIG) were submitted to BWSTT at speeds 2, 3 and 4 km/h. An EMG analysis was performed to evaluate the muscle activity of lateral vastus (LV), biceps femorales (BF), tibial anterior (TA) and gastrocnemius lateral (GL) throughout the cycle of the step. Results: The CG had greater distal muscle activity TA and GL when compared to GLM with greater proximal activity, VL and BF, during all gait phases. The velocity that presented greater muscular activity was the intermediate (3km/h), when compared as speeds 2Km/h and 4km/h. Increased speed resulted in greater influence on the distal muscles. Conclusion: the velocity can influence motor responses. Increased speed had an important role in increasing muscle activity, however, muscle activity was greater at intermediate velocity (3km / h)
3

Respostas motoras durante a marcha com suporte de peso corporal na esteira em diferentes velocidades em indivíduos com lesão medular / Motor responses during body weight support treadmill gait at different speeds in individuals with spinal cord injury

Natalia Padula 14 March 2018 (has links)
A Lesão Medular (LM) afeta a funcionalidade do indivíduo e pode reduzir drasticamente a independência. A restauração da mobilidade e do andar, é uma das principais metas das intervenções na população com LM, e nesse contexto o treinamento locomotor (TLSP) é uma intervenção utilizada com objetivo de fornecer estímulos sensoriais específicos ao sistema nervoso danificado para estimular as redes e circuitos preservados da medula. A velocidade é uma aferência sensorial importante durante o TLSP em esteira. Objetivo: investigar o efeito da variação de velocidade sobre as respostas motoras de indivíduos com lesões medulares durante TLSP em esteira. Método: 20 sujeitos sem LM denominado de grupo controle (GC) e 13 com LM completa (GLM) foram submetidos ao protocolo TLSP em esteira nas velocidades 2, 3 e 4 km/h. Foi realizada uma análise de EMG para avaliar atividade muscular de vasto lateral (VL), bíceps femural (BF), tibial anterior (TA) e gastrocnêmio lateral (GL) ao longo do ciclo do passo. Resultados: O GC apresentou maior atividade muscular distal TA e GL quando comparado ao GLM com maior atividade proximal VL e BF durante todas as fases da marcha. A velocidade que apresentou maior atividade muscular foi a intermediária (3km/h), quando comparado as velocidades 2Km/h e 4km/h. O aumento da velocidade resultou em maior influência nos músculos distais. Conclusão: a velocidade pode influenciar nas respostas motoras locomotoras de indivíduos com LM. O aumento da velocidade teve um papel importante no aumento da atividade muscular, contudo a atividade muscular foi maior na velocidade intermediária (3km/h) / Spinal Cord Injury (SCI) affects the individual\'s functionality and can gradually reduce independence. The restoration of mobility and walking, is one of the main goals of the interventions in SCI population. In this context body weight support treadmill training (BWSTT) is an intervention used to provide specific sensory stimuli to the damaged nervous system to stimulate the networks and circuits preserved in the spinal cord. Velocity is an important sensory afferment during the BWSTT. Objective: to investigate the effect of speed variation on motor responses of use with spinal cord injuries BWSTTl. Method: 20 healthy subjects composed the control group (CG) and 13 with complete SCI (SCIG) were submitted to BWSTT at speeds 2, 3 and 4 km/h. An EMG analysis was performed to evaluate the muscle activity of lateral vastus (LV), biceps femorales (BF), tibial anterior (TA) and gastrocnemius lateral (GL) throughout the cycle of the step. Results: The CG had greater distal muscle activity TA and GL when compared to GLM with greater proximal activity, VL and BF, during all gait phases. The velocity that presented greater muscular activity was the intermediate (3km/h), when compared as speeds 2Km/h and 4km/h. Increased speed resulted in greater influence on the distal muscles. Conclusion: the velocity can influence motor responses. Increased speed had an important role in increasing muscle activity, however, muscle activity was greater at intermediate velocity (3km / h)
4

Plasticidade induzida por treinamento locomotor na medula espinal intacta em ratos: correlatos morfol?gicos

Nunes, Ana Carla Lima 02 July 2009 (has links)
Made available in DSpace on 2014-12-17T15:16:04Z (GMT). No. of bitstreams: 1 AnaCLN.pdf: 1365991 bytes, checksum: a91aa932e949e0fb6e624f6ad5057083 (MD5) Previous issue date: 2009-07-02 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The locomotion is one of the most important capabilities developed by the animals, whose improvement is dependent on several neural centers, including the spinal cord. This activity promotes a lot of spinal modifications that enable it to adapt and improve their connections. This study aimed to observe the morphological changes occurring in the spinal cord after locomotor training in intact rats. For that we used male Wistar rats, which were submitted to locomotor training in wheel activity in protocols 1, 3 and 7 days (30min/day), and the results were compared to a control group not subjected to exercise. Coronal sections of 40 μm of the lumbosacral spinal cord were subjected to immunohistochemical techniques anti-Egr1, anti-NMDA and anti-SP, to characterize the spinal plasticity related to these substances. Egr1-immunoreactive cells were increased in all laminas, essentially in those more intensely activated by locomotion, laminas IV-X levels L4-S3. All observed sections expressed NMDA-immunoreactivity. Analysis of SP in the spinal dorsal horn resulted no significant variations of this neuropeptide related to locomotion. The results suggest that locomotor training provides synaptic plasticity similar to LTP in all laminas of the lumbosacral spinal cord, in different intensities. However, the SP appears do not participate of this process in the spinal dorsal horn. This work will contribute for consolidating and characterization of synaptic plasticity in the spinal cord / A locomo??o ? uma das mais importantes capacidades desenvolvidas pelos animais, cujo aperfei?oamento ? dependente de v?rios centros neurais, incluindo a medula espinal. Esta atividade promove v?rias modifica??es espinais que a possibilita se adaptar e aperfei?oar suas conex?es. Este trabalho teve por objetivo observar as altera??es morfol?gicas ocorridas na medula espinal ap?s o treinamento locomotor de ratos intactos. Para isso foram utilizados ratos Wistar machos, os quais foram submetidos ao treinamento locomotor na roda de atividade em protocolos de 1, 3 e 7 dias (30min/dia), e os resultados foram comparados aos de um grupo controle, n?o submetido ao exerc?cio. Cortes coronais de 40 μm da medula espinal lombossacral foram submetidos a t?cnicas imunohistoquimicas anti-Egr1, anti-NMDA e anti-SP, para caracterizarmos a plasticidade espinal quanto a essas subst?ncias. C?lulas imunorreativas a Egr1 estavam aumentadas em todas as l?minas, intensamente nas regi?es mais ativadas pela locomo??o, l?minas IV-X dos n?veis L4-S3. Todas as sec??es observadas expressaram imunorreatividade a NMDA. A an?lise da SP no corno dorsal espinal resultou em aus?ncia de varia??es significantes deste neuropept?deo relacionadas com a locomo??o. Diante dos resultados, sugerimos que o treinamento locomotor proporciona plasticidade sin?ptica semelhante a LTP em todas as l?minas da medula espinal, em intensidades diferenciadas. No entanto, esse processo parece n?o ter a participa??o da SP no corno dorsal espinal. Este trabalho vem contribuir para a consolida??o e caracteriza??o da plasticidade sin?ptica na medula espinal
5

Assessing locomotion in cats trained on a flat treadmill and on a ladder treadmill before and after spinal cord injury (SCI)

Escalona Castillo, Manuel Jose 09 1900 (has links)
Les effets des lésions de la moelle épinière sur la locomotion sont souvent évalués sur un tapis roulant avec une surface plane, ce qui demande peu d’implication active des structures supraspinales. L’objectif du présent travail est d’évaluer si un type d’entraînement nécessitant une plus grande part de contrôle volontaire (c.-à-d. supraspinal) pourrait améliorer la récupération de la marche chez le chat après une hémilésion unilatérale spinale au niveau thoracique (T10). Pour ce faire, pendant 6 semaines les chats ont été entrainés sur un tapis roulant conventionnel ou sur un tapis-échelle roulante, tâche requérant un placement des pattes plus précis. Les paramètres de la marche ont été évalués par cinématique et électromyographie (EMG) avant et une fois par semaine pendant 6 semaines après lésion. Nos résultats comparant la marche sur tapis conventionnel à celle sur échelle roulante montrent des différences dans les excursions angulaires et les couplages entre les membres. On observe aussi des différences dans l’amplitude des EMG notamment une augmentation de la deuxième bouffée du muscle Semitendineux (St) sur l’échelle roulante. Après l’hémilésion spinale cette bouffée disparait du côté de la lésion tandis qu’elle est maintenue du côté intact. Après l’entrainement sur échelle roulante, on observe des changements de trajectoire de la patte et une disparition du pied tombant (foot drag) qui suggèrent une amélioration du contrôle de la musculature distale. Nos résultats montrent que le patron locomoteur observé sur tapis conventionnel est influencé par le type d’entraînement procuré. De plus, certains paramètres de la locomotion suggèrent que l’entraînement sur échelle roulante, qui requiert plus de contrôle supraspinal, favorise une meilleure récupération de la marche après lésion spinale. / The effects of spinal cord lesions on locomotion in animals is often assessed on a flat surface which requires minimal supraspinal demands. Here we investigated whether locomotor training requiring more voluntary commands could improve recovery in cats after a unilateral hemisection on the left side (Thoracic 10). Cats were trained for 6 weeks on a conventional flat treadmill (FTM) or on a ‘ladder treadmill’ (LTM) requiring precise foot positioning. Locomotor parameters such as kinematics and electromyographic activity (EMG) were evaluated before and once a week for 6 weeks after spinal hemisection. There were differences in angular excursions and limb couplings when comparing walking on FTM and LTM and important changes occurred in the amplitude of EMGs such as an increased second burst in Semitendinosus (St) during LTM stepping. After the left hemisection, this burst disappeared on the left side while it was maintained on the right (non lesioned) side. With LTM training, we observed changes in limb trajectories and disappearance of foot drag of the left foot during FTM stepping suggesting a better control of distal musculature. Our results show that locomotor patterns observed during FTM stepping are influenced by different training modalities and also that training on the LTM after a spinal hemisection, demanding more supraspinal control, leads to a better stepping pattern.

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