Data supplements
Figures
The following images represent the figures included in the article �Circadian Rhythms in Infants.�
Figure 1 Schematic representation of the circadian timing system. RHT=retinohypothalamic tract, SCN=suprachiasmatic nuclei.
Figure 2 The human SCN. Reproduced with permission from Mann NP, Haddow R, Stokes L, Goodley S, Rutter N. Effect of night and day on preterm infants in a newborn nursery: randomized trial. Br Med J (Clin Res Ed). 1986;293:1265-1267.
Figure 3 Schematic representation of human circadian system development. Estimated human ages are given. RHT=retinohypothalamic tract, SCN=suprachiasmatic nuclei.
Figure 4 Development of body temperature circadian rhythm as a function of age in preterm infants.
Figure 5 Plot of rest-activity patterns in a representative infant exposed to constant dim light. Dark bars represent activity. The arrow depicts the date of discharge. The number of days relative to discharge is shown on the left. The time of day is shown on top. Note that day-night differences in rest-activity patterns that are in synchrony with the light-dark cycle are not apparent until about 20 days after discharge.
Figure 6 Plot of rest-activity in a representative infant exposed to cycled lighting. Dark bars represent activity. The arrow depicts the date of discharge. The number of days relative to discharge is shown on the left. The time of day is shown on top. Note the regular patterns of rest and activity in the infant exposed to cycled lighting before and after discharge.
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