ABSTRACT
PURPOSE: To investigate allometric relationships among body mass (BM), muzzle-tail length (MTL), and tibia length (TL) in Wistar rats and establish their growth rate change parameters. METHODS: Eighteen male and 18 female Wistar rats were studied from the 3rd to the 21st week of age. BM, MTL, and TL were measured daily, and relative growth was compared using allometry. RESULTS: A positive correlation between BM and MTL (p<0.05) and BM and TL (p<0.05) was observed. Males and females showed comparable curves; however, females had turning points at a younger age. The allometric relationship between BM and MTL presented a regular increase until reaching a mass of 351 g (males) and 405 g (females). BM and TL showed an initial increase until 185 g (males) and 182 g (females), and then reached a plateau that finished at 412 g (males) and 334 g (females), to display another increase. CONCLUSIONS: The allometric relationship of body mass with animal length and tibia length was comparable for male and female rats, with female rats maturing earlier. Animal longitudinal growth occurred in a single stage. In contrast, tibia length depicted two stages of accelerated growth with an intermediate period of deceleration.
Subject(s)
Body Size/physiology , Body Weight/physiology , Rats, Wistar/growth & development , Tail/growth & development , Tibia/growth & development , Age Factors , Animals , Female , Male , Reference Standards , Sex Factors , Tail/anatomy & histology , Tibia/anatomy & histology , Time FactorsABSTRACT
PURPOSE : To investigate allometric relationships among body mass (BM), muzzle-tail length (MTL), and tibia length (TL) in Wistar rats and establish their growth rate change parameters. METHODS : Eighteen male and 18 female Wistar rats were studied from the 3rd to the 21st week of age. BM, MTL, and TL were measured daily, and relative growth was compared using allometry. RESULTS : A positive correlation between BM and MTL (p<0.05) and BM and TL (p<0.05) was observed. Males and females showed comparable curves; however, females had turning points at a younger age. The allometric relationship between BM and MTL presented a regular increase until reaching a mass of 351 g (males) and 405 g (females). BM and TL showed an initial increase until 185 g (males) and 182 g (females), and then reached a plateau that finished at 412 g (males) and 334 g (females), to display another increase. CONCLUSIONS : The allometric relationship of body mass with animal length and tibia length was comparable for male and female rats, with female rats maturing earlier. Animal longitudinal growth occurred in a single stage. In contrast, tibia length depicted two stages of accelerated growth with an intermediate period of deceleration.
Subject(s)
Animals , Female , Male , Body Size/physiology , Body Weight/physiology , Rats, Wistar/growth & development , Tail/growth & development , Tibia/growth & development , Age Factors , Reference Standards , Sex Factors , Time Factors , Tail/anatomy & histology , Tibia/anatomy & histologyABSTRACT
Introdução: O fisioterapeuta é o profissional da área da saúde responsável pelo tratamento e prevenção de distúrbios cinético-funcionais. As primeiras exposições de risco laboral desse profissional acontecem durante o estágio supervisionado de formação em fisioterapia. Objetivo: O objetivo deste estudo foi correlacionar os resultados obtidos por uma análise fotogramétrica postural com os sintomas álgicos relatados nos questionários de avaliação funcional da coluna vertebral em estagiários do curso de fisioterapia. Método: Quinze estagiários foram submetidos a um protocolo de análise fotogramétrica postural e responderam semanalmente aos questionários de Roland-Morris e Oswestry, durante cinco semanas. Essa correlação foi estabelecida pelo teste de Spearman. Resultados: Os resultados revelaram um aumento gradual da pontuação dos questionários ao longo de cada semana com a maior pontuação sendo obtida ao final da quarta semana. Não foram evidenciadas correlações satisfatórias entre a maioria das variáveis da avaliação fotogramétrica com ambos os questionários. Conclusão: Concluiu-se que é possível o relato de mínimo grau de desconforto musculoesquelético após o primeiro mês de exposição ao risco laboral relacionado ao contexto de atuação do fisioterapeuta. Porém, esse desconforto auto-relatado não correlaciou-se satisfatoriamente com as variáveis da avaliação fotogramétrica postura.
Introduction: The physiotherapist is the health care professional responsible for treatment and prevention of functional kinetic disorders. The first exposures to this occupational risk occur during the graduate supervised training in physiotherapy. Objective: The objective of this study was to correlate the results obtained by a photogrammetric postural analysis with pain symptoms reported by physiotherapy graduate trainees in questionnaires carried out for functionalspinal assessment. Method: Fifteen trainees were submitted to a protocol of photogrammetric postural analysis and responded on a weekly basis to Roland-Morris and Oswestry questionnaires for a period of five weeks. This correlation was established by Spearman's testo Results: The results revealed a gradual increase in the scores of the questionnaires over the course of each week with the highest score being obtained at the end of the fourth week. No satisfactory correlations were observed with between the majority of the photogrammetric evaluation variables either of the questionnaíres. Conclusion: It was concluded that a minimum degree of musculoskeletal discomfort may be reported after the first month of exposure to physiotherapist work-related or occupational risk. However, that self-reported discomfort is not satisfactorily correlated with the variables of postural photogrammetric evaluation.
