新生児の微笑反応と覚醒水準・自発的運動・触刺激との関係
1973 年 44 巻 1 号 p. 46-50
詳細
1973 年 44 巻 1 号 p. 46-50
Frequencies of spontaneous smiles, startles, and mouthing movements of 14, 3-to-6-days old neonates were measured for consecutive 4 hours in the context of their arousal levels. Moreover, each neonate was given the tactile stimulus to find whether it elicited smiles or not. There were significant relationships between the arousal level and the types and frequencies of spontaneous behaviors. Spontaneous smiles occurred most frequently in irregular sleep in which startles didn't occur. By contrast, spontaneous startles occurred most frequently in regular sleep in which smiles didn't occur. Mouthing movements were found to increase in proportion to the neonate's closeness to wakefulness. Smiling responses were not elicited by the tactile stimulus.
