Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-23T00:12:01Z No. of bitstreams: 1 FabianaTenorioGomesDaSilva_DISSERT.pdf: 1184676 bytes, checksum: 9d03e59733d51511aa0eec704401ade1 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-26T22:56:55Z (GMT) No. of bitstreams: 1 FabianaTenorioGomesDaSilva_DISSERT.pdf: 1184676 bytes, checksum: 9d03e59733d51511aa0eec704401ade1 (MD5) / Made available in DSpace on 2016-02-26T22:56:55Z (GMT). No. of bitstreams: 1 FabianaTenorioGomesDaSilva_DISSERT.pdf: 1184676 bytes, checksum: 9d03e59733d51511aa0eec704401ade1 (MD5) Previous issue date: 2014-12-08 / Introdu??o: Estimula??o transcraniana por corrente continua (ETCC) tem sido usada em estudos voltados para o tratamento da dor perif?rica cr?nica em pessoas com les?o medular (LM), mas seus efeitos sobre o sistema nervoso auton?mico (SNA) nestes indiv?duos s?o inexistentes e, portanto a necessidade de estudos ? de fundamental import?ncia, pois estes indiv?duos apresentam desbalan?o auton?mico, e sua intensidade ? dependente do grau e n?vel da les?o. Objetivo: Investigar se a ETCC sobre o c?rtex motor prim?rio ir? modular o controle do SNA em pessoas com LM e se estas altera??es s?o dependentes do grau e n?vel de les?o. M?todos: Estudo randomizado, placebo controlado, aplicou ETCC an?dica ou sham sobre o c?rtex motor prim?rio (M1), bilateralmente, com o eletrodo de refer?ncia sendo colocado na protuber?ncia occipital. Dezenove sujeitos (les?o incompleta baixa (n=7), completa baixa (n=9) e completa alta (n=3)) visitaram o laborat?rio tr?s vezes e receberam ETCC ativa ou sham por 13min. A variabilidade da frequ?ncia card?aca (VFC) foi medida antes, durante e p?s-estimula??o. A VFC foi calculada usando a analise espectral batimento a batimento dos intervalos derivados das ondas r-r. Resultados: A ETCC modulou o sistema nervoso auton?mico de forma divergente nos grupos analisados. Nos indiv?duos com LM completa alta a ETCC n?o alterou a VFC. Para os indiv?duos com LM incompleta baixa a ETCC alterou a VFC no sentido de aumentar o simp?tico e reduzir o parassimp?tico e para os indiv?duos com LM completa baixa a ETCC reduziu o simp?tico e aumentou o parassimp?tico. Conclus?o: O presente estudo observou que a ETCC an?dica aplicada sobre o c?rtex motor prim?rio de forma bilateral, conseguiu modular o balan?o do SNA em pessoas com les?o medular e este efeito ? dependente do grau e n?vel de les?o. Palavras-chave: Estimula??o Transcraniana; Sistema nervoso auton?mico; Variabilidade da frequ?ncia card?aca; Les?o medular. / Introduction: Transcranial Direct Current Stimulation (tDCS) has been used in studies for the treatment of chronic pain, but their effects on the autonomic nervous system (ANS) are non-existent. Therefore, the need for studies is of fundamental importance, as these individuals have autonomic imbalance and the intensity of this is dependent on the degree and level of injury. Objective: We investigated the effect of tDCS on the ANS in people with spinal cord injury (SCI) with different degrees and levels of injury. Methods: Randomized, placebo-controlled, double-blind, applied anodal tDCS or sham on the primary motor cortex (M1), bilaterally. The subjects (lower incomplete injury, n = 7; lower complete injury, n = 9; and high complete thoracic injury, n = 3) visited the laboratory three times and received active or sham tDCS for 13min. The heart rate variability (HRV) was measured before, during and after stimulation and analyzed the variables LF, HF and LF / HF. Results: The tDCS modulated the ANS in different ways among the groups. In individuals with SCI high complete thoracic the tDCS did not change the HRV. However, for individuals with SCI low incomplete, tDCS changed the HRV in order to increase sympathetic (LF, p = 0.046) and reduced parasympathetic (HF, p = 0.046). For individuals SCI low complete to tDCS changed the HRV reduction sympathetic (LF, p = 0.017) and increased parasympathetic (HF, p = 0.017). Conclusions: The present study suggests that anodal tDCS applied on the motor cortex bilaterally could modulate the ANS balance in people with spinal cord injury and that this effect is dependent on the degree and level of injury.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-02-15T14:53:05Z No. of bitstreams: 1 EdsonMenesesDaSilvaFilho_DISSERT.pdf: 1071828 bytes, checksum: 66af333e048ec8dc3d85d5abd30c9a47 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-02-20T00:13:34Z (GMT) No. of bitstreams: 1 EdsonMenesesDaSilvaFilho_DISSERT.pdf: 1071828 bytes, checksum: 66af333e048ec8dc3d85d5abd30c9a47 (MD5) / Made available in DSpace on 2018-02-20T00:13:34Z (GMT). No. of bitstreams: 1 EdsonMenesesDaSilvaFilho_DISSERT.pdf: 1071828 bytes, checksum: 66af333e048ec8dc3d85d5abd30c9a47 (MD5) Previous issue date: 2017-12-12 / O v?rus da Chikungunya (CHIK) ? uma epidemia no Brasil com 170.000 casos no primeiro semestre de 2016. Mais de 60% dos pacientes apresentam rea??o e remiss?o de artralgia cr?nica com dor debilitante que dura anos. N?o existem agentes terap?uticos espec?ficos para tratar e reabilitar pessoas infectadas com CHIK. Dor persistente pode levar ? incapacita??o exigindo tratamento farmacol?gico de longo prazo. Os avan?os nos tratamentos n?o farmacol?gicos s?o necess?rios para promover o al?vio da dor sem efeitos colaterais e restaurar a funcionalidade. Aqui, n?s demonstramos que a Estimula??o Transcraniana com Corrente Cont?nua (ETCC) sobre o c?rtex motor prim?rio reduz significativamente a dor na fase cr?nica da CHIK. Nossos achados sugerem que a ETCC pode ser uma terapia eficaz, barata e implant?vel em ?reas que n?o possuem recursos e que apresentam um grande n?mero de pacientes com dor cr?nica persistente gerada pela CHIK. / The Chikungunya (CHIK) virus is epidemic in Brazil, with 170,000 cases in the first half of 2016. More than 60% of patients present relapsing and remitting chronic arthralgia with debilitating pain lasting years. There are no specific therapeutic agents to treat and rehabilitee infected persons with CHIK. Persistent pain can lead to incapacitation, requiring long-term pharmacological treatment. Advances in non-pharmacological treatments are necessary to promote pain relief without side effects and to restore functionality. Here, we demonstrate that the transcranial direct current stimulation (tDCS) across the primary motor cortex significantly reduces pain in the chronic phase of CHIK. Our findings suggest tDCS could be an effective, inexpensive and deployable therapy to areas lacking resources with a great number of patients with chronic CHIK persistent pain.

Submitted by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-04-10T13:55:08Z No. of bitstreams: 1 BibianoMadridTese2016.pdf: 2121621 bytes, checksum: e27cdc9330322e7d6796de7bcf0c585c (MD5) / Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-04-10T13:55:16Z (GMT) No. of bitstreams: 1 BibianoMadridTese2016.pdf: 2121621 bytes, checksum: e27cdc9330322e7d6796de7bcf0c585c (MD5) / Made available in DSpace on 2017-04-10T13:55:16Z (GMT). No. of bitstreams: 1 BibianoMadridTese2016.pdf: 2121621 bytes, checksum: e27cdc9330322e7d6796de7bcf0c585c (MD5) Previous issue date: 2016-02-25 / The present study is composed by four papers with different aims, as follows: 1) Verify the reliability of the Wingate anaerobic test. 2) Verify the reliability of lactate minimum protocol with induction of hyperlactatemia individualized by ratings perceived exertion. 3) Verify the efficiency of a new submaximal protocol for aerobic evaluation, with workloads determination by ratings perceived exertion, denominated RPE-13, in identify the intensity of exercise associated at maximal lactate steady state and lactate minimum. 4) Verify the influence of anodal transcranial direct current stimulation on left temporal lobe in the heart rate variability and in the running of 3000 meters. The Wingate study had a sample composed by 15 cyclists that performed three Wingate tests. The lactate minimum study had a sample composed by 20 university students active physically that performed two times the test. In the study with RPE-13 the sample was formed by 11 young adults active physically that performed three tests, the RPE-13, lactate minimum and maximal lactate steady state. Yet, in the study with anodal transcranial direct current stimulation the sample was composed by 11 amateurs??? runners that performed of the 3000 meters test in two conditions, in the anodal stimulation and Sham condition (placebo). The tests of Wingate and lactate minimum showed good reliability. The RPE-13 test showed to be efficient to identify an intensity of exercise associated at maximal lactate steady state and lactate minimum. Therefore, the transcranial direct current stimulation changed the heart rate variability, increasing the chronotropic reserve and improving the performance in running of 3000 meters in mean 10 seconds. / O presente trabalho ?? composto por quatro artigos cient??ficos com diferentes objetivos, conforme a seguir: 1) Verificar a reprodutibilidade do teste anaer??bio de Wingate. 2) Verificar a reprodutibilidade do protocolo de lactato m??nimo com a indu????o a hiperlactatemia individualizada pela percep????o subjetiva de esfor??o. 3) Verificar a efici??ncia do um novo protocolo subm??ximo de avalia????o aer??bia, com cargas determinadas pela percep????o subjetiva de esfor??o, denominado RPE-13, em identificar a intensidade de exerc??cio associada ao m??ximo estado est??vel de lactato e lactato m??nimo. 4) Verificar a influ??ncia da estimula????o transcraniana por corrente cont??nua an??dica sob o lobo temporal esquerdo sobre a variabilidade da frequ??ncia card??aca e no desempenho em teste de corrida de 3000 metros. O estudo com Wingate teve uma amostra composta por 15 ciclistas que realizaram tr??s testes de Wingate. O estudo com lactato m??nimo teve uma amostra composta por 20 estudantes universit??rios fisicamente ativos que realizaram o teste duas vezes. No estudo com o protocolo RPE-13 a amostra foi formada por 11 adultos jovens fisicamente ativos que realizaram tr??s testes, o RPE-13, lactato m??nimo e m??ximo estado est??vel de lactato. J?? no estudo com estimula????o transcraniana por corrente cont??nua a amostra foi composta onze corredores recreacionais que cumpriram o teste de 3000 metros em duas condi????es, na condi????o com estimula????o an??dica e na condi????o Sham (placebo). Os testes de Wingate e lactato m??nimo apresentaram boa reprodutibilidade. O teste RPE-13 se mostrou eficiente em identificar uma intensidade de exerc??cio associada m??ximo estado est??vel de lactato e lactato m??nimo. Por sua vez, a estimula????o transcraniana por corrente cont??nua modificou a variabilidade da frequ??ncia card??aca, aumentando a reserva cronotr??pica e melhorando o desempenho do teste de corrida de 3000 metros em m??dia em 10 segundos.

Made available in DSpace on 2014-12-17T14:44:19Z (GMT). No. of bitstreams: 1 JefersonTPR_DISSERT.pdf: 1206303 bytes, checksum: 925c332309b72a390145b34b32b2ac27 (MD5) Previous issue date: 2014-03-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Introduction: The sport practiced by people with disabilities has been growing in recent years. Consequently, advances in assessment and training methods have emerged. However, the paralympic sport keeps in tow these advances, with few specific studies that consider disability as intervening factor. The transcranial direct current stimulation (tDCS) is a technique that has proven to be capable of modulating brain function. Studies show beneficial effects of tDCS on muscle strength, power and fatigue during exercise. Objective: Investigate de the effect of tDCS on movement control in para-powerlifters. Methods: Eight subjects underwent two sessions of motion capture, which previously applied the anodic tDCS or sham sessions in the cerebellum. Three movements were performed with increasing load between 90-95% of 1MR. The movements were recorded by an 10 infrared cameras system which reconstructed the 3D trajectory of markers placed on the bar. Results: There have been changes between the anodic and sham conditions over bar level (initial, final, maximum during the eccentric and concentric phase) and in the difference between the final and initial bar level. Moreover, there was difference in bar level (final and during the eccentric phase) comparing athletes amputees and les autres. Conclusion: The findings of this study suggest that tDCS applied prior to the exercise over the cerebellum in para-powerlifters acts differently according to disability / Introdu??o: O esporte praticado por pessoas com defici?ncia vem crescendo nos ?ltimos anos. Consequentemente, avan?os nos m?todos de avalia??o e treinamento t?m surgido. Por?m, o esporte paral?mpico segue a reboque destes avan?os, com poucos estudos espec?ficos que considerem a defici?ncia como fator interveniente. A estimula??o transcraniana por corrente cont?nua (ETCC) ? uma t?cnica que vem se mostrando capaz de modular a fun??o cerebral. Estudos mostram efeitos ben?ficos da ETCC sobre a for?a muscular, fadiga e pot?ncia durante exerc?cio. Objetivo: Investigar o efeito da ETCC sobre o controle do movimento em para-halterofilistas. Metodologia: Oito sujeitos foram submetidos a duas sess?es de captura de movimentos, sendo aplicado previamente as sess?es ETCC an?dica ou sham no cerebelo. Foram realizados tr?s movimentos com carga crescente entre 90-95% de 1RM. Os movimentos foram gravados por um sistema com 10 c?meras infravermelho e tiveram reconstru?da a trajet?ria 3D de marcadores colocados na barra. Resultados: Houveram mudan?as entre as condi??es an?dica e sham sobre os desn?veis inicial, final, m?ximos durante a fase exc?ntrica e conc?ntrica e sobre a diferen?a entre o desn?vel inicial e final. Al?m disto, houve diferen?a no desn?vel final e durante a fase exc?ntrica ao comparar os atletas amputados e les autres. Conclus?o: Os achados do presente estudo sugerem que a ETCC aplicada previamente ao exerc?cio sobre o cerebelo em para-halterofilistas atua de forma diferenciada de acordo com a defici?ncia

Made available in DSpace on 2014-12-17T14:44:17Z (GMT). No. of bitstreams: 1 GertrudesNM_DISSERT.pdf: 3164686 bytes, checksum: e4de9859908d8c6840498816188878f8 (MD5) Previous issue date: 2013-02-28 / The fluctuacion force has been increasingly used in studies with elderly as a good predictor of performance and functionality of the motor. However, most analyzes the fluctuation of force in one session. Thus, identifying the minimum amount of sessions needed for familiarization with the fluctuation strength in isometric exercise become relevant. Furthermore, to investigate the effects of applying transcranial direct current stimulation (tDCS) associated with regular exercise on rates fluctuation task force is extremely important. In the first experiment, volunteers were subjected to a protocol marked by a familiarization session to establish the parameters of VCM and eight sessions with intensity of 30% MVC in office. It was observed that two familiarization sessions are required so there is a fluctuation stabilizing force. In experiment II, subjects performed an isometric contraction before and after applying tDCS (cathode, anode and sham) applied to M1. ETCC anodic effectively contributed to reducing the fluctuation of force during isometric exercise in the elderly, while the cathodic caused the increased levels of strength fluctuation. It was concluded that there is a need to implement a familiarization protocol with at least two sessions to avoid possible misunderstandings of measurements in tests of fluctuacion force. Besides that tDCS interfered with the behavior of the oscillations of force, with cathodic promoting increased fluctuation strength and anodic contributed to greater stability, demonstrating the potential of this technique neuromodulation associated with exercise as rehabilitation tools / A flutua??o de for?a tem sido cada vez mais utilizada em estudos com idosos como um bom preditor de desempenho e funcionalidade da motricidade. No entanto, a maioria analisa a flutua??o de for?a em sess?o ?nica. Assim, identificar a quantidade de sess?es m?nimas necess?rias para a familiariza??o ao teste de flutua??o de for?a em exerc?cio isom?trico tornar-se pertinente. Al?m disso, investigar os efeitos da aplica??o da Estimula??o Transcraniana por Corrente Cont?nua (ETCC) associada ? pr?tica regular de exerc?cio sobre os ?ndices de flutua??o de for?a ? tarefa de extrema relev?ncia. No experimento I, volunt?rias foram submetidas a um protocolo de familiariza??o marcado por uma sess?o para estabelecer os par?metros de CVM e oito sess?es com intensidade de 30%CVM em exerc?cio. Observou-se que duas sess?es de familiariza??o s?o necess?rias para que haja uma estabiliza??o da flutua??o de for?a. No experimento II, volunt?rias realizaram uma contra??o isom?trica antes e ap?s a aplica??o de ETCC (cat?dica, an?dica e sham) aplicada ao M1. ETCC an?dica contribuiu efetivamente para a redu??o da flutua??o de for?a em idosos durante exerc?cio isom?trico, enquanto que a cat?dica provocou o aumento dos ?ndices de flutua??o de for?a. Concluiu-se que h? a necessidade de aplica??o de um protocolo de familiariza??o com pelo menos duas sess?es para que sejam evitados equ?vocos de mensura??es em testes de avalia??o da flutua??o de for?a. Al?m de que a ETCC interferiu no comportamento das oscila??es de for?a, com cat?dica promovendo aumento da flutua??o de for?a e a an?dica contribuiu para uma maior estabilidade, demonstrando o potencial dessa t?cnica de neuromodula??o associada ao exerc?cio como ferramentas de reabilita??o