|
|
|
|
|
| Quagliotto,E.; Casali,K.R.; Dal Lago,P.; Rasia-Filho,A.A.. |
| The rat posterodorsal medial amygdala (MePD) links emotionally charged sensory stimuli to social behavior, and is part of the supramedullary control of the cardiovascular system. We studied the effects of microinjections of neuroactive peptides markedly found in the MePD, namely oxytocin (OT, 10 ng and 25 pg; n=6/group), somatostatin (SST, 1 and 0.05 μM; n=8 and 5, respectively), and angiotensin II (Ang II, 50 pmol and 50 fmol; n=7/group), on basal cardiovascular activity and on baroreflex- and chemoreflex-mediated responses in awake adult male rats. Power spectral and symbolic analyses were applied to pulse interval and systolic arterial pressure series to identify centrally mediated sympathetic/parasympathetic components in the heart rate variability... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Baroreceptor and chemoreceptor reflexes; Power spectral analysis; Symbolic analysis; Oxytocin; Somatostatin; Angiotensin II. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000200128 |
| |
|
|
| Perseguini,N.M.; Takahashi,A.C.M.; Rebelatto,J.R.; Silva,E.; Borghi-Silva,A.; Porta,A.; Montano,N.; Catai,A.M.. |
| The objective of this study was to use linear and non-linear methods to investigate cardiac autonomic modulation in healthy elderly men and women in response to a postural change from the supine to the standing position. Fourteen men (66.1 ± 3.5 years) and 10 women (65.3 ± 3.3 years) were evaluated. Beat-to-beat heart rate was recorded in the supine and standing positions. Heart rate variability was studied by spectral analysis, including both low (LFnu-cardiac sympathetic modulation (CSM) indicator) and high (HFnu-cardiac vagal modulation (CVM) indicator) frequencies in normalized units as well as the low frequency/high frequency (LF/HF) ratio. Symbolic analysis was performed using the following indexes: 0V% (CSM indicator), 1V% (CSM and CVM indicators),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heart rate variability; Autonomic nervous system; Symbolic analysis; Spectral analysis; Elderly; Gender. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000100005 |
| |
|
|
|
