title: Long term continuously fed infants do not develop heart rate circadian rhythm.
abstract: Heart rate (HR) was studied separately for three behavioral states (waking, paradoxical sleep, quiet sleep) at four periods of the nycthemeron, in 8 infants continuously fed from birth. Continuously fed infants show no significant differences for each of the three behavioural states between the HR values of the four periods of the nycthemeron, while controls show a clear decrease during the night-time. Differences between term behavioral states exist both in continuously fed infants and in controls. Long term continuous nutrition does not allow for the establishment of the circadian modulation of HR.
mesh_terms: D000704:Analysis of Variance; D001831:Body Temperature; D002940:Circadian Rhythm; D006339:Heart Rate; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D007231:Infant, Newborn