|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|4934151||1363489||2018||8 صفحه PDF||ندارد||دانلود کنید|
â¢Children born very preterm had lower LF/HF ratio during wake and stage 2 sleep.â¢LF, Tot Pow, and LF/HF ratio were positively related with morning cortisol secretion.â¢The results indicate long-term ANS alterations after very preterm birth.â¢The results support the notion of a feedback system between the ANS and the HPA axis.
The autonomic nervous system (ANS) plays a major role in the human stress response and reflects physical and psychological adaptability to a changing environment. Long-term exposure to early life stressors may alter the function of the ANS. The present study examines differences in the ANS between children born very preterm and full-term as well as the association between the ANS and the hypothalamic-pituitary-adrenal (HPA) axis, the other main branch of the human stress system.Fifty-four healthy children born very preterm (<32nd gestational week) and 67 full-term children aged 7â12 years provided data for the present study. Polysomnography (PSG) assessments were obtained during a night at the childrenâs home in lying position at rest (wake) and during different sleep stages (stage 2 sleep, slow wave sleep, rapid-eye-movement sleep). Autonomic function was assessed by use of heart rate variability, specifically low frequency power (LF), high frequency power (HF), total spectral power (Tot Pow), and the LF/HF ratio. HPA axis activity was measured using salivary cortisol the next morning at awakening, 10, 20, and 30Â min later.Children born very preterm had lower LF/HF ratio during wake and stage 2 sleep compared to full-term children. Moreover, higher LF, Tot Pow, and LF/HF ratio during wake, stage 2 sleep, and REM sleep were related to more post-awakening cortisol secretion.The present study provides evidence on long-term ANS alterations after very preterm birth. Moreover, findings suggest a relation between the ANS and the HPA axis and therefore support the notion of mutual feedback between the two human stress systems.
Journal: Psychoneuroendocrinology - Volume 87, January 2018, Pages 27-34