[Smiling responses in newborn infants: relations to arousal level, spontaneous movements, and the tactile stimulus (author's transl)].
D001143:Arousal; D005149:Facial Expression; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009068:Movement; D010812:Physical Stimulation; D013216:Reflex, Startle; D014851:Wakefulness