Increased facial temperature as an early warning in Sudden Infant Death Syndrome

The promotion of supine sleeping position in young infants has resulted in significant declines in the incidence of Sudden Infant Death Syndrome altho ugh little is understood in terms of mechanisms. We hypothesize that supine sleeping position promotes appropriate thermal regulation via the face and head which is the major source of infant heat loss. By facilitating temper ature regulation, the supine position ensures that the centre for thermoreg ulation in the hypothalamus does not become dysfunctional due to local temp erature fluctuations. Because these hypothalamic, thermoregulatory neurones are synaptically linked to those regulating respiration in the medulla, ad equate temperature control by the infant maintains normal respiration. In c ontrast, an increase in face and head temperature over and above core tempe rature would suggest thermoregulatory stress and an increased likelihood of respiratory apnoea. (C) 2001 Harcourt Publishers Ltd.