997 resultados para Lesão da espinal medula


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Mode of access: Internet.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES

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Parkinson disease (PD) is associated with motor symptoms and dopaminergic cell loss in the nigrostriatal pathway. Alpha-synuclein is the major component of the Lewy bodies, the biological hallmarks of disease, and has been associated with familial cases of PD. Recently, the spinal cord stimulation (SCS) showed to be effective to alleviate the Parkinson symptoms in animal models and human patients. In this project, we characterized the motor and electrophysiological effects of alpha-synuclein overexpression in the substantia nigra of rats. We further investigated the effects of spinal electrical stimulation, AMPT and L-dopa administration in this model. Method: Sprague-Dawley rats were injected with empty viral vector or the vector carrying the gene for alpha-synuclein in the substantia nigra, and were tested weekly for 10 weeks in the open field and cylinder tests. A separated group of animals implanted with bilateral electrode arrays in the motor cortex and the striatum were recorded in the open field, during the SCS sessions and the pharmacological experiments. Results: Alpha-synuclein expression resulted in motor asymmetry, observed as the reduction in use of contralateral forepaw in the cylinder test. Animals showed an increase of local field potential activity in beta band three and four weeks after the virus injection, that was not evident after the 5th week. AMPT resulted in a sever parkinsonian state, with reduction in the locomotor activity and significant peak of oscillatory activity in cortex and striatum. SCS was effective to alleviate the motor asymmetry at long term, but did not reduce the corticostriatal low frequency oscillations observed 24 hs after the AMPT administration. These oscillations were attenuated by L-dopa that, even as SCS, was not effective to restore the locomotor activity during the severe dopaminergic depletion period. Discussion: The alpha-synuclein model reproduces the motor impairment and the progressive neurodegenerative process of PD. We demonstrated, by the first time, that this model also presents the increase in low frequency oscillatory activity in the corticostriatal circuit, compatible with parkinsonian condition; and that SCS has a therapeutic effect on motor symptom of this model.

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Spinal cord injury causes permanent disabling manifestations, affecting the anatomic integrity, bodily changes and functional limitations related to the disability state. It was aimed to analyze the social representation, stress level and experiences of fishermen victims of spinal cord injury caused by diving accident in the Northern beaches of Brazil. It is a descriptive - exploratory study with quantitative, qualitative and representational data developed i n fishermen’s villages in nine beaches of Northern shore/RN, between October 2013 to August 2014, after the approval of the Ethics Committee in Research of the Universidade Federal do Rio Grande do Norte, under the number 431.891/2013, CAAE 20818913.0.0000 .5537. The sample was composed by 44 fishermen with spinal cord injury, defined from inclusion and exclusion criteria of the participants. It was used as instrument to collect the data a semi structured interview. Quantitative data was analyzed by descrip tive statistics, showing the data through table, boxes and graphics by Microsoft Excel. Data from interviews were submitted to the software called Analyse Lexicale par Contexte d’un Ensemble de Segments de Texte (ALCESTE) using the analysis of the Social R epresentation Theory and Center Core Theory. It is shown the outcomes of the research through four articles, following the normative recommendations of the journals. Participants of the study were all male, age mean 49,6 years, elementary school (68,2%), m arried (77,3%); paraplegia sequel (50,0%). Most of them showed stress (75,0%), almost in the exhaustion stage (33,3%), prevalent insomnia symptoms (95,5%) in the last hours; hypertension (97,7%) in the last week and sexual troubles (95,5%) in the last mont h). Decompressive illness caused spinal cord injury (57,1%), occurred prevalently in low summer (75,0%), northern shore (96,4%), having as main consequences the paresthesia and pain in the upper and lower limbs (67,9%), followed by death (25,0%). Interview analysis under the understanding of Social Representation of spinal cord injury allowed the appearance of seven categories: Treatment: limitation and expectative; Spinal Cord injury: before and after; Retirement: reality yet to come; Disability: dependenc y, incapacity, vulnerability; Overcoming and autonomy; Self feelings: physics losses and new start; Life and labor: impediments, plans and changes. The center core of the representation is found in the first category by the expectative and limitation on th e treatment, meanwhile the outskirt elements are in seventh and third categories. Physics limitation for fishing activities and retirement expectative is the most outstanding of the structure. Social representation concerning spinal cord injury is found in a transaction moment between before and after with the prevented fishing activity, coping of the situation with the potential remaining. The anchoring is established in the desire for changes related to the improvements of life and health conditions exper ienced day by day through faith. This study finishes pointing out the range of the objectives, which topic is relevant for public health of fishermen. It is suggested prevention measures, promotion and health recovery of fishermen, besides safe, healthy an d worthy conditions as a compromise of social and health politics.

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The peripheral giant cell lesion ( PG CL ) and the central giant cell lesion ( CGC L) are lesions histologically similar affecting the head and neck region . The study aimed to analyze the immunohistochemical expression of markers GLUT - 1 , GLUT - 3 and M - CSF in a series of cases of PGCL and CGCL , in trying to understand the different biological behavior of these pathologies . The sample consisted of 20 tissue specimens of PGCL 20 central lesion of not aggressive giant cell ( CLNAGC) and 20 central lesi on of aggressive giant cell ( CLAGC), coming from the Pathology Unit of Oral Pathology of the Department of Dentistry of UFRN . W as performed the s emi - quantitative and qualitative analysis of immunohistochemical expression of the markers in giant cells and m ononuclear cells . In relation to the GLUT - 1, it was found a statistically significant difference (p < 0.05) in the number of mononuclear cells immunomarked between the PGCL and the CLNAGC and between the PGCL and CLAGC . Regarding the intensity of staining w as also observed a statistically significant difference both at the mononuclear cells as in giant cells between PL and CLNAGC and between PGCL and CLAGC , at the giant cells there was also a statistically significant difference between the CLNAGC and CLAGC . In relation to GLUT - 3 , was found a statistically significant difference between PGCL and CLAGC and between CLAGC and CLNAGC in amount of mononuclear cells immunomarked . Regarding the intensity of labeling for such protein was found a statistically signifi cant difference at the giant cells between PL and CLAGC . To the M - CSF was observed only a statistically significant difference in the intensity of labeling at the mononuclear cells between PGCL and CLNAGC and between PGCL and CLAGC . Based on these results, we can conclude the participation of GLUT - 1, GLUT - 3 and M - CSF in the pathogenesis of the lesions studied. The bigger immunostaining of these proteins in mononuclear cells show that these cells perform a higher metabolic activity and osteoclastogenic, espe cially in CLAGC . It was found that the mononuclear cells were more related to the pathogenesis of the studied lesions than properly the giant s cell s.

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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.

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The coexistence of gingival recession (GR) with root coverage indication and non-carious cervical lesions (LCNC) generates the need for a protocol that respects and promotes health of dental and periodontal tissues and allows treatment predictability. The main objectives of this theses were: (1) verify, through clinical evaluations, the connective tissue graft for root coverage on direct and indirect restorations made of ceramic resin; (2) analyze the influence of the battery level of the LED curing unit in the composite resin characteristics; (3) assess the influence of restorative materials, composite resin and ceramics, on the viability of gingival fibroblasts from primary culture. Nine patients with good oral hygiene and occlusal stability diagnosed with LCNCs the anterior teeth including premolars associated with gingival recession (class I and II of Miller) and only gingival recession were selected. After initial clinical examination, occlusal adjustment was performed and the patients had their teeth randomized allocated on direct composite resin restoration of LCNC, polishing and GR treatment with connective tissue graft and advanced coronally flap CR group (n = 15); and indirect ceramic restoration of the LCNC's and GR treatment (CTG+CAF) Group C (n = 15). The GR presented teeth with no clinically formed LCNCs cavity were treated using (CTG+CAF) being the control group (n = 15). Sorption and solubility tests, analysis of the degree of conversion and diametral tensile strength were performed in composite resin samples (n = 10) photoactivated by 100, 50 and 10% battery charge LED unit. The viability of fibroblasts on composite resin, ceramics and dentin disks (n = 3) was examined. Clinical follow-up was performed for three months. The data obtained at different stages were tabulated and subjected to analysis for detection of normal distribution and homogeneity. The results showed that: the LED unit with 10% battery affects the characteristics of the composite resin; restorative materials present biocompatibility with gingival fibroblasts; and the association of surgical and restorative treatment of teeth affected by NCCL and GR presents successful results at 3-month follow-up.

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Objetivo: Establecer el nivel de adherencia a procesos de neurorehabilitación funcional a largo plazo y su relación con la discapacidad y la calidad de vida relacionada con la salud en adultos con lesión medular crónica de la ciudad de Pasto, Colombia (año 2014). Materiales y métodos: Se realizó un estudio descriptivo correlacional bivariado con 38 personas mayores de 18 años con lesión medular de la ciudad de Pasto (Colombia), que al momento de la evaluación tuvieran más de seis meses de evolución de la lesión y que hubieran estado en procesos de Neurorehabilitación Funcional a largo plazo previo a la evaluación. Se utilizó SMAN, SCI-DAS Y WHOQOL-BREF. El procesamiento de la información se hizo mediante el programa estadístico SPSS versión 21.0. Resultados: En general no se encontró correlación estadísticamente significativa de la adherencia a procesos de neurorehabilitación funcional a largo plazo con discapacidad y con la CVRS (p>0,05); pero si se encontró correlación estadísticamente significativa entre la discapacidad y la CVRS (p<0,05), mostrando mayor asociación entre CVRS y factores ambientales relacionados con la discapacidad. Conclusiones: Las personas con lesión medular en la ciudad de Pasto presentaron un nivel de adherencia global medio a procesos de neurorehabilitación funcional a largo plazo. El factor paciente de adherencia presenta un nivel alto. El grado de discapacidad global de adultos con lesión medular crónica en Pasto fue moderado, siendo mayormente influenciada por los factores ambientales. El nivel de CVRS en los de adultos con lesión medular crónica en Pasto en promedio fue de 66.52%. La adherencia a procesos de neurorehabilitación funcional a largo plazo no se relaciona con la discapacidad en los adultos con lesión medular crónica en Pasto.La adherencia a procesos de neurorehabilitación funcional a largo plazo no se relaciona con la CVRS ni entre las puntuaciones globales ni entre sus distintos factores en los adultos con lesión medular crónica en Pasto. El grado de discapacidad tuvo una relación moderada e inversamente proporcional con la CVRS. Los factores ambientales de la discapacidad influyen en mayor medida esta relación en los adultos con lesión medular crónica en Pasto.

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Este es un ensayo clínico controlado realizado en 327 pacientes ASA II, sometidas a cesárea, distribuidas aleatoriamente en dos grupos iguales para identificar las variaciones hemodinámicas y nivel metamérico, al aplicar Anestesia Intratecal con Lidocaína Isobárica al 2(AILI) comparada con Lidocaína Hiperbárica al 5(AILH), ambas a dosis de 80 mg. Resultados: la AILI, se mantuvo en determinadas metámeras sin sustancial variabilidad, comportamiento totalmente contrario a la AILH. Las diferencias estadísticas en la presión sistólica, diastólica, y frecuencia cardiaca, entre ambos tipos de anestesia no fueron significativas. La hipotensión se presentó en 32,9con AILI, y 54con AILH; siendo tratada con 2,26 mg (ñ 3.65) y 3,93 mg (ñ 4,26) de efedrina respectivamente. (p> 0.05). Con AILI se presentaron 4 casos de bloqueo raquídeo alto más dificultad respiratoria y, con AILH 3 casos, de los cuales solo 2 presentaron dificultad respiratoria. Conclusión: la AILI produce un bloqueo nervioso más predecible que la AILH. Los valores hemodinámicos y la incidencia de complicaciones, entre ambos anestésicos fueron semejantes

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(Artículos periodísticos)

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A Hemoglobinúria paroxística noturna (HPN) é uma doença clonal da célula mãe hematopoiética pluripotente, que origina um clone de células que adquirem uma mutação somática no gene PIG-A, condicionando assim a expressão de proteínas ancoradas à membrana através do GPI (Glicosil- Fosfatidil-Inositol). A presença de clones de HPN em síndromes mielodisplásicas (SMD) demonstrou ter implicações no prognóstico e terapêutica. Com o presente trabalho pretendeu-se contribuir para o melhor conhecimento da frequência de casos HPN em amostras de medula óssea com suspeita de SMD e que a frequência encontrada nas células de linha a neutrófilo, monocítica e eritróide no último estádio da maturação na medula óssea (MO) é similar à observada nas células da mesma linha no sangue periférico (SP). O estudo fenotípico foi realizado em 826 amostras de MO com suspeita de SMD e com rasgos fenotípicos sugestivos desta entidade por citometria de fluxo, de acordo com o painel EUROFLOW para diagnóstico de SMD, para estudo da maturação da linha a Neutrófilo, linha a Monócito, e Eritróide. Nas 826 amostras de MO detetaram-se 7 casos com presença de clones HPN, o que corresponde a uma frequência de 0.8%. A percentagem de células HPN, determinada simultaneamente no SP e na MO, foi idêntica nas 3 linhas hematopoiéticas estudadas. Verificou-se, ainda, que a expressão de IREM-2 no clone maduro normal e no clone HPN nos monócitos, em SP e MO, encontrava-se estatisticamente diminuída no clone HPN. Os resultados do presente estudo indicam uma menor incidência de clones HPN em SMD comparativamente com outros estudos prévios e que é válida a sua determinação em amostras de aspirados de medula óssea. Verificaram-se diferenças claras na expressão de IREM-2 entre clone HPN e células normais da linha monocítica, o que sugere que este possa ser uma proteína ancorada por GPI.

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Dissertação de Mestrado apresentada ao Instituto Superior de Psicologia Aplicada para obtenção de grau de Mestre na especialidade de Psicologia Clínica.

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Introdução: As lesões medulares acarretam consigo a problemática da deficiência, as suas respectivas sequelas interferem na qualidade de vida bem como na independência funcional destas pessoas, sendo habitual a existência de limitações que se prolongam ao longo a vida. O presente estudo visa a caracterização de sujeitos com lesão medular há mais de um ano, no que diz respeito à sua qualidade de vida e independência funcional, assim como, a relação entre as variáveis sóciodemográficas (género, idade, estado civil, escolaridade e profissão) e clínicas em estudo (nível, tipo, etiologia e data da lesão). Materiais e Métodos: O presente trabalho apresenta-se como um estudo observacional exploratório descritivo com abordagem quantitativa. A amostra foi formada por indivíduos adultos com lesão medular recrutados através da Associação Salvador e Associação Vida Independente. As medidas instrumentais utilizadas pelo estudo são o questionário sóciodemográfico e clínico, bem com a escala MIF (Granger, Hamilton, Keith, Zielezny, & Sherwins, 1986) e a escala SF-36 (Ware % Sherbourne, 1992). Resultados e Discussão: As análises demonstraram valores satisfatórios. A independência funcional e sua respectiva dimensão física e sóciocognitiva revelam resultados estatisticamente significativos com a variável nível neurológico. No que diz respeito à qualidade de vida esta demonstrou resultados estatisticamente significativos entre a dimensão desempenho emocional e a escolaridade entre o desempenho físico e a profissão e vitalidade e idade. Revelou igualmente valores satisfatórios entre todas as dimensões e o nível neurológico, entre a função social e data da lesão e por último entre a etiologia e função social, vitalidade, dor, saúde geral e mental. Conclusão: Os resultados obtidos com este estudo vêm reforçar a visão de que apesar dos indivíduos experienciarem um evento traumático e aspetos negativos após a lesão medular, há diferentes níveis de percepção de QoL e IF e que estas variam em função de algumas variáveis sóciodemográficas e clínicas. Neste ponto são ainda apresentadas as limitações do estudo e discutidas propostas de trabalhos futuros.

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Dissertação de Mestrado Integrado em Medicina Veterinária