Acute Auditory Stimulation with Different Styles of Music Influences Cardiac Autonomic Regulation in Men

Background: No clear evidence is available in the literature regarding the acute effect of different styles of music on cardiac autonomic control. Objectives: The present study aimed to evaluate the acute effects of classical baroque and heavy metal musical auditory stimulation on Heart Rate Variability (HRV) in healthy men. Patients and Methods: In this study, HRV was analyzed regarding time (SDNN, RMSSD, NN50, and pNN50) and frequency domain (LF, HF, and LF / HF) in 12 healthy men. HRV was recorded at seated rest for 10 minutes. Subsequently, the participants were exposed to classical baroque or heavy metal music for five minutes through an earphone at seated rest. After exposure to the first song, they remained at rest for five minutes and they were again exposed to classical baroque or heavy metal music. The music sequence was random for each individual. Standard statistical methods were used for calculation of means and standard deviations. Besides, ANOVA and Friedman test were used for parametric and non-parametric distributions, respectively. Results: While listening to heavy metal music, SDNN was reduced compared to the baseline (P = 0.023). In addition, the LF index (ms2 and nu) was reduced during exposure to both heavy metal and classical baroque musical auditory stimulation compared to the control condition (P = 0.010 and P = 0.048, respectively). However, the HF index (ms2) was reduced only during auditory stimulation with music heavy metal (P = 0.01). The LF/HF ratio on the other hand decreased during auditory stimulation with classical baroque music (P = 0.019). Conclusions: Acute auditory stimulation with the selected heavy metal musical auditory stimulation decreased the sympathetic and parasympathetic modulation on the heart, while exposure to a selected classical baroque music reduced sympathetic regulation on the heart

Evaluation of movements of lower limbs in non-professional ballet dancers: hip abduction and flexion

<p>Abstract</p> <p>Background</p> <p>The literature indicated that the majority of professional ballet dancers present static and active dynamic range of motion difference between left and right lower limbs, however, no previous study focused this difference in non-professional ballet dancers. In this study we aimed to evaluate active movements of the hip in non-professional classical dancers.</p> <p>Methods</p> <p>We evaluated 10 non professional ballet dancers (16-23 years old). We measured the active range of motion and flexibility through Well Banks. We compared active range of motion between left and right sides (hip flexion and abduction) and performed correlation between active movements and flexibility.</p> <p>Results</p> <p>There was a small difference between the right and left sides of the hip in relation to the movements of flexion and abduction, which suggest the dominant side of the subjects, however, there was no statistical significance. Bank of Wells test revealed statistical difference only between the 1^stand the 3^rdmeasurement. There was no correlation between the movements of the hip (abduction and flexion, right and left sides) with the three test measurements of the bank of Wells.</p> <p>Conclusion</p> <p>There is no imbalance between the sides of the hip with respect to active abduction and flexion movements in non-professional ballet dancers.</p

Impacto do diabetes mellitus gestacional sobre a massa placentária humana

Introdução: O diabetes mellitus gestacional (DMG) é uma alteração patológica do metabolismo energético materno desencadeado pela incapacidade da gestante produzir quantidades suficientes de insulina para compensar a intolerância à glicose desencadeada pela ação do hormônio lactogênio placentário (HPL). Tendo em vista que os níveis plasmáticos do HPL são proporcionais à massa da placenta e que eles são máximos próximo ao período em que a placenta adquire seu maior tamanho e período que a hiperglicemia se manifesta na gestante com DMG, é possível inferir que talvez exista correlação entre a massa placentária e essa doença. Objetivo: Avaliar se existe correlação entre o DMG e a massa placentária. Métodos: Pesquisa descritiva, transversal e com abordagem quantitativa, que foi realizada em um hospital público de Santa Catarina, Brasil. A pesquisa incluiu 20 mulheres grávidas, 10 com e 10 sem DMG, que concordaram em participar do estudo. Resultados: A média das massas das placentas do Grupo Controle foi de 505,63±12,18 g, enquanto a do grupo com DMG foi de 561,00 ±14,25 g. Conclusão: Este estudo sugere que a massa placentária das gestantes com DMG é significativamente maior do que a massa das placentas das gestantes hígidas