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- W4251899173 abstract "Abstract Background: We investigated the influence of diaphragmatic activation control (diaphC) on the relaxation rate and contractile properties, as well as the electrical activity of inspiratory muscles, assessed non-invasively using the sniff inspiratory pressure test (SNIP) and surface electromyography, respectively, in healthy subjects. Methods: Twenty-two subjects (10 men and 12 women) performed 10 sniff maneuvers in two different days: with and without diaphC instructions. For the SNIP test with diaphC, the subjects were instructed to perform intense activation of the diaphragm. The tests with the best SNIP values were used for analysis. Results: The maneuver with diaphC when compared to the maneuver without diaphC exhibited significant lower values for: SNIP (p <0.01), maximum relaxation rate (MRR) (p <0.01), maximum rate of pressure development (MRPD) (p <0.01) and electrical activity of the sternocleidomastoid (SCM) (p <0.01), scalene (SCL) (p = 0.01) and intercostal (CI) (p = 0.03) muscles; as well as significant longer contraction (CT) times (p = 0.02). In addition, the decay constant (tau, τ) and relaxation time (½ RT) did not present any changes. Conclusion: The diaphragmatic control performed during the SNIP test influences the inspiratory pressure and the contractile properties of inspiratory muscles. This occurs due to changes in the pattern of muscle recruitment, which change forcevelocity characteristics of the test. Thus, instruction on diaphC should be encouraged for better performance of the SNIP test and for evaluation targeting the diaphragm muscle activity." @default.
- W4251899173 created "2022-05-12" @default.
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- W4251899173 date "2020-06-12" @default.
- W4251899173 modified "2023-09-27" @default.
- W4251899173 title "Effects of Diaphragmatic Control on Multiparametric Analysis of the Nasal Inspiratory Pressure Test and Inspiratory Muscle Activity in Healthy Subjects" @default.
- W4251899173 doi "https://doi.org/10.21203/rs.3.rs-34266/v1" @default.
- W4251899173 hasPublicationYear "2020" @default.
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