title: Polygraphic studies on normal infants during the first six months of life. II. Respiratory rate and variability as a function of state.
mesh_terms: D000375:Aging; D003448:Crying / Q000502:physiology; D004594:Electrophysiology; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012119:Respiration; D012890:Sleep / Q000502:physiology