Medidas operantes de limiar auditivo em crianças com surdez pré-lingual, usuárias de implante coclear

Limiares auditivos de crianças surdas pré-linguais usuárias de implante coclear foram avaliados com estimulação elétrica em um dos eletrodos mediais. A avaliação empregou um procedimento operante do tipo go/no go para ensinar uma discriminação simples, evidenciada por uma resposta motora, entre presença e ausência do estímulo auditivo. Estabelecida a linha de base, a manipulação na intensidade do estímulo foi implementada de acordo com o método psicofísico de escada modificado, começando por uma seqüência descendente. Os sete participantes do estudo mostraram perda da precisão no responder sob controle do estímulo quando a intensidade diminuía além de um certo valor e a precisão era recuperada quando a intensidade era novamente aumentada, o que permitiu a identificação de limiares individuais. Os resultados sugerem que o método psicofísico combinado com o procedimento operante pode ser uma alternativa viável para avaliar limiar auditivo de pessoas sem linguagem em situação clínica de regulagem do implante coclear.

No limiar do mundo visível: a noção de esquema corporal nos cursos de Merleau-Ponty na Sorbonne

Suivant notre intention générale qui est d'étudier longitudinalement l'utilisation que Merleau-Ponty fait de la notion de schéma corporel dans sa philosophie, nous nous consacrons dans cet article à ses cours à la Sorbonne. Ces cours font partie d'une période intermédiaire de son oeuvre. Le philosophe y amorce des discussions concernant la corporeité à partir de la psychologie de l'enfant et de la psychanalyse, en abordant le problème de l'intersubjectivité et la théorie du schéma corporel. Merleau-Ponty comprend que l'acquisition d'un schéma corporel unitaire, total, implique une décentralisation de soi, de façon que le corps propre, le corps d'autrui et le monde puissent s'entrelacer dans un tissu relationnel qui implique inextricablement visibilité et épaisseur intra-corporel. Nous considérons que dans ces études Merleau-Ponty effectue un grand pas vers la notion de chair telle qu'on la trouve dans ses textes plus tardifs.

Estado, burguesía e legislação trabalhista brasileira no limiar dos anos 30: notas para uma discussão

The creation and implementation of Brazilian labor laws during the 1930s gave rise to important political debates. The various stakeholders - the state, the bourgeoisie, and workers - each with their own social project, had forged mechanisms designed to protect their own interests. Within this framework, this article addresses the arguments regarding the Expulsion of Foreigners Act (1907), the "Dois Tercos"(Two-thirds) Act (1930), and the Unionization Act (1931). These acts provide clear evidence that the growth of state interventionism was accompanied by tensions and changes, and that the labor legislation was not simply the 'gift' of a Corporate State.

O limiar de esforço percebido (LEP) corresponde à potência crítica e a um indicador de máximo estado estável de consumo de oxigěnio

The perceived exertion has been a target of several investigations, many times with association with objective physiological indicators in exercise. Recently, the identification of the perceived exertion threshold (PET) was proposed in the water running, which presented no difference in relation to the critical velocity. Theoretically, both parameters would be indicators of the maximum steady state of variables such as V̇O2 and blood lactate. The objective of this work was to verify the coincidence between PET, critical power (PCrit) and an indicator of maximum V̇O2 steady state (PCrit') in cycle ergometer. Eight male participants were submitted to progressive effort test in order to determine V̇O2peak (46.7 ± 8.5 ml/kg/min) and to four rectangular tests until exhaustion for the estimation of the critical power model parameters, PET and PCrit'. The hyperbolic relation between mechanical power and time spent for the V̇O2peak to be reached in each test was used for the PCrit' estimation, considered as the asymptote in the power axis, and the portion of the anaerobic work capacity (CTAnaer) depleted up to the establishment of the V̇O2peak (CTAnaer'). In order to identify PET, the straight lines angular coefficients of the perceived exertion in time (ordinate) and the powers used (abscissa) were adjusted to a linear function that provided a point in the power axis in which the perceived exertion would be kept indefinitely stable. The parameters PCrit and CTAnaer were estimated by means of the power-time non-linear equation. In order to compare the estimations of PET, PCrit and PCrit', the analysis of variance ANOVA for repeated measurements was employed, and the associations were established through the Pearson correlation. CTAnaer and CTAnaer' were compared through the t test. PET (180 W ± 61 W), PCrit (174 W ± 43 W) and PCrit' (176 W ± 48 W) were not significantly different and the correlations were of 0.92-0.98. CTAnaer' (14,080 ± 5,219 J) was lower than CTAnaer (22,093 ± 9,042 J). One concludes that the PET predicts the intensity of PCrit and PCrit' with accuracy.

Comparação entre limiar anaeróbio determinado por variáveis ventilatórias e pela resposta do lactato sanguíneo em ciclistas

Many investigations have shown that the coincidence between the ventilatory thresholds and those thresholds using the lactate response does not happen all of the time, suggesting that there is no relationship between the cause-effect between these phenomena. Thus, the present study had as main purpose to compare and correlate the Oxygen consumption (V̇O 2), the power (W), and the heart rate (HR) values attained using protocols to determine the Ventilatory Threshold (VT) and the Individual Anaerobic Threshold (IAT). The sampling was constituted by eight State and National level cyclists (age: 27.88 ± 8.77 years; body mass: 65.19 ± 4.40 kg; height: 169.31 ± 5,77 cm). The IAT was determined starting from a three minutes 50 W warm up with progressive increases of 50 W.3min -1 up to achieving the voluntary exhaustion, when the blood was collected in the last 20 seconds of each phase, and during the recovering period. In order to determine the VT, it was used the same protocol used to determine the IAT, but without performing the blood collection. The VT was identified through the changes in the pulmonary ventilation, as well as of the ventilatory equivalent of the O 2 and CO 2. The t-Student test showed no significant statistical difference in any of the attained variables. The associations found were high and significant. The V̇O 2 (ml.kg -1.min. -1), P (W), and HR (bpm) corresponding to the VT and IAT, as well as the associations between variables were respectively: 48.00 ± 3.82 vs. 48.08 ± 3.71 (r = 0.90); 256.25 ± 32.04 vs. 246.88 ± 33.91 (r = 0.84); 173.75 ± 9.18 vs. 171.25 ± 12.02 (r = 0.97). According to the results attained, it can be concluded that the IAT and the VT produce similar V̇O 2, W, and HR values, favoring the adoption of the VT because it is a non-invasive method to determine the anaerobic threshold in cyclists.

O welfare State no Brasil: características e perspectivas no limiar do ano 2000

Incluye Bibliografía

Validade do teste do lactato mínimo para a determinação do limiar anaeróbio em ratos durante exercício de natação

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Resultado reagente próximo ao limiar de reaticidade: uma dificuldade no diagnóstico laboratorial da hepatite C

Pós-graduação em Pesquisa e Desenvolvimento (Biotecnologia Médica) - FMB

Comparação de diferentes métodos lactacidêmicos e glicêmicos de determinação do limiar anaeróbio em eqüinos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Uma educação para além do bem e do mal: o limiar da experiência educativa de um móbile solto no furacão

Pós-graduação em Educação - IBRC

No limiar do horizonte: manifestações e discursos divisionistas Norte/Sul e política integracionista no Paraná (1920-1975)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeitos do carprofeno e da buprenorfina no limiar nociceptivo mecânico com ou sem presença de foco inflamatório em gatos

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação da atividade elétrica e limiar de dor à pressão dos músculos masseter e temporal anterior com placas de diferentes espessuras

Pós-graduação em Odontologia - FOA

Um método não-limiar para redução de ruído em sinais de voz no domínio wavelet

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)