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    Roberta Brunelli

    Orientadores: Daniela Cristina Carvalho de Abreu, Alberto Cliquet JuniorDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências MédicasResumo: O objetivo deste estudo foi verificar os efeitos da laserterapia de... more
    Orientadores: Daniela Cristina Carvalho de Abreu, Alberto Cliquet JuniorDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências MédicasResumo: O objetivo deste estudo foi verificar os efeitos da laserterapia de baixa potência no comprimento de onda ?=780nm entre diferentes períodos de tratamento 7, 14 e 21 dias e verificar a dose (10J/cm2 ou 50J/cm2) que promove melhor reparo muscular através das análises histopatológicas e imunohistoquímicas. Foram utilizados 54 ratos machos divididos em 3 grupos: GC: grupo controle (criolesão, sem tratamento); G10: criolesão do músculo tibial anterior (TA) e tratados com laser dose 10J/cm² e G50: criolesão do músculo TA e tratados com laser dose 50J/cm² que foram subdivididos em 3 subgrupos (n=6): 7, 14 e 21 dias de tratamento. Os achados histopatológicos revelaram maior organização das fibras musculares dos grupos tratados com laser 10J/cm² e 50J/cm² durante os períodos 7 e 14 dias em relação ao grupo controle; no períod...
    Morphological aspects and Cox-2 expression after exposure to 780-nm laser therapy in injured skeletal muscle: an in vivo study
    Background:Osteoarthritis (OA) of the knees is a chronic degenerative disease that causes changes in the articular cartilage, the most common musculoskeletal disease worldwide (Blanco et al., 1998). The World Health Organization estimates... more
    Background:Osteoarthritis (OA) of the knees is a chronic degenerative disease that causes changes in the articular cartilage, the most common musculoskeletal disease worldwide (Blanco et al., 1998). The World Health Organization estimates that 25% of those over 65 years suffer from pain and disability associatedwith this disease. Symptoms of kneeOA are related to pain joint, loss of muscle strength of the lower extremities, gait disturbance and decreased aerobic capacity (Fransen et al., 2001). Considering that this disease increases with advancing age, it is important to evaluate the influence of aging on parameters of gait in individuals with knee OA. Purpose:To compare the parameters of gait in individuals above and below 65 years with bilateral knee osteoarthritis. Methods: Twenty individuals of both sexes with bilateral knee OA grades I-III according to the classification of Kellgren and Lawrence were evaluated and divided into group 1 (n= 10): individuals with OA below 65 years (45–55 years) and group 2 (n= 10): individuals with OA over 65 years (65–75 years) who live in the city of Ribeirao Preto, Brazil, which signed a consent form agreeing to participate in this study, approved by the Committee of Ethics of the Clinical Hospital, Medicine School of Ribeirao Preto. Participants underwent a radiograph of bilateral knees and all were diagnosed with some degree of OA (I–III in both knees) by an experienced radiologist. For analysis of gait variables (speed and step length) the equipmentGAITRitePlatinum26′ Portable Walkway System was used. The participants were instructed to walk (simulating habitual gait) on the carpet of the equipment, the gait starting 1 meter before and finishing 1 meter after the carpet to exclude acceleration and deceleration (repeating the task 3 times). For statistical analyses the T test of Student with level of significance p≤ 0.05 was used. Results: Subjects in group 1 presented amean (±standard deviation) value of speed gait of 1.08± 0.11m/s and left step length of 56.92± 3.34 cm and right step length of 57.42± 3.14 cm, with no significant difference compared to group 2 who presented mean value of speed gait of 1.02± 0.14m/s and left step length of 57.96± 5.39 cm and right step length of 56.80± 5.54 cm. Conclusion(s):Neither the aging process or OA presence promoted changes in gait parameters in individuals with OA. It can be concluded that aging was not a factor that promoted changes in variables of gait of subjects with knee OA. Further studies should be conducted to evaluate and to compare gait parameters between subjects with and without OA with different age ranges. Implications: The better understanding of the impact of aging process on gait aspects in individuals with knee OA is important to help in the elaboration of physical therapy intervention.
    O objetivo deste estudo foi verificar os efeitos da laserterapia de baixa potencia no comprimento de onda ?=780nm entre diferentes periodos de tratamento 7, 14 e 21 dias e verificar a dose (10J/cm2 ou 50J/cm2) que promove melhor reparo... more
    O objetivo deste estudo foi verificar os efeitos da laserterapia de baixa potencia no comprimento de onda ?=780nm entre diferentes periodos de tratamento 7, 14 e 21 dias e verificar a dose (10J/cm2 ou 50J/cm2) que promove melhor reparo muscular atraves das analises histopatologicas e imunohistoquimicas. Foram utilizados 54 ratos machos divididos em 3 grupos: GC: grupo controle (criolesao, sem tratamento); G10: criolesao do musculo tibial anterior (TA) e tratados com laser dose 10J/cm² e G50: criolesao do musculo TA e tratados com laser dose 50J/cm² que foram subdivididos em 3 subgrupos (n=6): 7, 14 e 21 dias de tratamento. Os achados histopatologicos revelaram maior organizacao das fibras musculares dos grupos tratados com laser 10J/cm² e 50J/cm² durante os periodos 7 e 14 dias em relacao ao grupo controle; no periodo 21 dias os grupos apresentaram semelhancas na reparacao tecidual. Em relacao a area da lesao os grupos tratados com laser 10J/cm² e 50J/cm² durante 7 dias obtiveram diminuicao significativa (p ? 0.05) da area da lesao em relacao ao grupo controle, sendo que os grupos 14 e 21 dias nao apresentaram diferencas significativas entre eles. Na contagem dos vasos o grupo tratado com laser 10J/cm² no 14° dia apresentou aumento dos vasos em relacao ao grupo tratado com dose 50J/cm², mas nao em relacao ao grupo controle. Nos tempos de 7 e 21 dias os grupos nao apresentaram diferenca significativa entre si. Com relacao as analises imunohistoquimicas da myoD no periodo de 7 dias os grupos tratados com laser 10J/cm² e 50J/cm² apresentaram maior imunomarcacao comparada com o grupo controle, no periodo 14 e 21 dias a imunomarcacao estava ausente. A imunomarcacao da miogenina estava presente de forma semelhante nos periodos 7 e 14 dias para os tres grupos analisados e no periodo 21 dias a imunomarcacao da miogenina estava ausente em todos os grupos experimentais. Os resultados mostraram que o laser possui efeitos positivos no reparo muscular. Abstract
    in vivo study
    O objetivo deste estudo foi verificar os efeitos da laserterapia de baixa potencia no comprimento de onda ?=780nm entre diferentes periodos de tratamento 7, 14 e 21 dias e verificar a dose (10J/cm2 ou 50J/cm2) que promove melhor reparo... more
    O objetivo deste estudo foi verificar os efeitos da laserterapia de baixa potencia no comprimento de onda ?=780nm entre diferentes periodos de tratamento 7, 14 e 21 dias e verificar a dose (10J/cm2 ou 50J/cm2) que promove melhor reparo muscular atraves das analises histopatologicas e imunohistoquimicas. Foram utilizados 54 ratos machos divididos em 3 grupos: GC: grupo controle (criolesao, sem tratamento); G10: criolesao do musculo tibial anterior (TA) e tratados com laser dose 10J/cm² e G50: criolesao do musculo TA e tratados com laser dose 50J/cm² que foram subdivididos em 3 subgrupos (n=6): 7, 14 e 21 dias de tratamento. Os achados histopatologicos revelaram maior organizacao das fibras musculares dos grupos tratados com laser 10J/cm² e 50J/cm² durante os periodos 7 e 14 dias em relacao ao grupo controle; no periodo 21 dias os grupos apresentaram semelhancas na reparacao tecidual. Em relacao a area da lesao os grupos tratados com laser 10J/cm² e 50J/cm² durante 7 dias obtiveram diminuicao significativa (p ? 0.05) da area da lesao em relacao ao grupo controle, sendo que os grupos 14 e 21 dias nao apresentaram diferencas significativas entre eles. Na contagem dos vasos o grupo tratado com laser 10J/cm² no 14° dia apresentou aumento dos vasos em relacao ao grupo tratado com dose 50J/cm², mas nao em relacao ao grupo controle. Nos tempos de 7 e 21 dias os grupos nao apresentaram diferenca significativa entre si. Com relacao as analises imunohistoquimicas da myoD no periodo de 7 dias os grupos tratados com laser 10J/cm² e 50J/cm² apresentaram maior imunomarcacao comparada com o grupo controle, no periodo 14 e 21 dias a imunomarcacao estava ausente. A imunomarcacao da miogenina estava presente de forma semelhante nos periodos 7 e 14 dias para os tres grupos analisados e no periodo 21 dias a imunomarcacao da miogenina estava ausente em todos os grupos experimentais. Os resultados mostraram que o laser possui efeitos positivos no reparo muscular. Abstract
    A number of studies have explored possible relationships, behavior, and meanings of spatial and temporal gait variables in frail and pre-frail older adults, particularly the gait speed variable. However, it is necessary to know the... more
    A number of studies have explored possible relationships, behavior, and meanings of spatial and temporal gait variables in frail and pre-frail older adults, particularly the gait speed variable. However, it is necessary to know the relationship of other spatial and temporal gait variables of pre-frail older adults. Thus, the objective of the present study was to evaluate and compare gait standards between pre-frail and non-frail older people. A total of 69 older adults aged 60 year and older, divided into two groups, non-frail (n = 42) and pre-frail (n = 27), were evaluated. Gait parameters were analyzed using the GAITRite® Platinum 26' Portable Walkway System. Pre-frail older people had smaller step lengths (P = 0.041), larger base of support (P = 0.040), lower speed (P = 0.019), lower single support percentage (P = 0.033) and higher double support percentage (P = 0.036), compared with non-frail older people. A history of falls was correlated to lower gait speed and step length in pre-frail older adults. Identifying pre-frail older people could have significant clinical consequences, as frailty is a dynamic process, and such individuals can therefore progress into a state of frailty or revert to a non-frail state. Therefore, the identification of gait variables in pre-frail older people can be an important tool to recognize gait deficits and to initiate the appropriate treatment. Geriatr Gerontol Int 2015; ●●: ●●-●●.
    The aim of this study was to evaluate the effects of 660 nm low-level laser therapy (LLLT) on muscle regeneration after cryolesion in rat tibialis anterior muscle. Sixty-three Wistar rats were divided into a control group, 10 J/cm(2)... more
    The aim of this study was to evaluate the effects of 660 nm low-level laser therapy (LLLT) on muscle regeneration after cryolesion in rat tibialis anterior muscle. Sixty-three Wistar rats were divided into a control group, 10 J/cm(2) laser-treated group, and 50 J/cm(2) laser-treated group. Each group formed three subgroups (n = 7 per group), and the animals were sacrificed 7, 14, or 21 d after lesion. Histopathological findings revealed a lower inflammatory process in the laser-treated groups after 7 d. After 14 d, irradiated animals at both fluences showed higher granulation tissue, new muscle fibers, and organized muscle structure. After 21 d, full tissue repair was observed in all groups. Moreover, irradiated animals at both fluences showed smaller necrosis area in the first experimental period evaluated. MyoD immunoexpression was observed in both treated groups 7 d postinjury. Myogenin immunoexpression was detected after 7 and 14 d. The higher fluence increased the number of blo...
    The aim of this study was to evaluate the effects of 660 nm low-level laser therapy (LLLT) on muscle regeneration after cryolesion in rat tibialis anterior muscle. Sixty-three Wistar rats were divided into a control group, 10 J/cm(2)... more
    The aim of this study was to evaluate the effects of 660 nm low-level laser therapy (LLLT) on muscle regeneration after cryolesion in rat tibialis anterior muscle. Sixty-three Wistar rats were divided into a control group, 10 J/cm(2) laser-treated group, and 50 J/cm(2) laser-treated group. Each group formed three subgroups (n = 7 per group), and the animals were sacrificed 7, 14, or 21 d after lesion. Histopathological findings revealed a lower inflammatory process in the laser-treated groups after 7 d. After 14 d, irradiated animals at both fluences showed higher granulation tissue, new muscle fibers, and organized muscle structure. After 21 d, full tissue repair was observed in all groups. Moreover, irradiated animals at both fluences showed smaller necrosis area in the first experimental period evaluated. MyoD immunoexpression was observed in both treated groups 7 d postinjury. Myogenin immunoexpression was detected after 7 and 14 d. The higher fluence increased the number of blood vessels after 14 and 21 d. These results suggest that LLLT, at both fluences, positively affects injured skeletal muscle in rats, accelerating the muscle-regeneration process.
    The effects of LLLT were studied during muscle regeneration through gene expression. It was evaluated 10 and 50J/cm(2) doses during 7, 14 and 21days post cryoinjury, through histopathological analysis and mRNA MyoD, Myogenin, Vegf and... more
    The effects of LLLT were studied during muscle regeneration through gene expression. It was evaluated 10 and 50J/cm(2) doses during 7, 14 and 21days post cryoinjury, through histopathological analysis and mRNA MyoD, Myogenin, Vegf and Cox-2 expression. Irradiated groups presented less inflammatory process than control group after 14 and 21days. Cox-2 levels were downregulated in all irradiated groups after 7, 14 and 21days. On day 7, both treated groups had a downregulation of Vegf levels, and an upregulation after 14 and 21days, mainly with 50J/cm(2). The MyoD levels were upregulated with high dose in all periods and with low dose after 21days. Myogenin expression was downregulated in both treated groups after 7days, and was upregulated with 10J/cm(2) after 21days. These responses suggest that LLLT can improve the skeletal muscle regeneration through the gene expression stimulation.