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Late preterm infants, born between 34 and 36 weeks gestation, have significantly higher morbidity than neonates born at full term, which may be partly related to reduced sensitivity of the arterial baroreflex. The present study assessed baroreflex control of heart rate (HR) and renal sympathetic nerve activity (RSNA) in near‐term fetal sheep at 123 ± 1 days gestation. At this age, although fetuses...
Sympathetic nerve activity (SNA) has two main properties, the presence of co‐ordinated bursts of activity, indicative of many nerve fibres firing at a similar time, and entrainment of the bursts to the cardiac cycle, due to inhibitory input from baroreceptors to a network of cell groups within the CNS. Although this patterning is used as a ‘gold standard’ for the identification of successful nerve...
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