Origins of smile and laughter: A preliminary study

被引：22

作者：

Kawakami, K

Takai-Kawakami, K

Tomonaga, M

Suzuki, J

Kusaka, T

Okai, T

机构：

[1] Univ Sacred Heart, Shibuya Ku, Tokyo 1508938, Japan

[2] Japan Womens Univ, Bunkyo Ku, Tokyo 1128681, Japan

[3] Kyoto Univ, Inst Primate Res, Aichi 4848506, Japan

[4] Showa Univ, Sch Med, Shinagawa Ku, Tokyo 1428666, Japan

来源：

EARLY HUMAN DEVELOPMENT | 2006年 / 82卷 / 01期

关键词：

infants; newborn infants; spontaneous smiles; spontaneous laughs;

D O I：

10.1016/j.earlhumdev.2005.07.011

中图分类号：

R71 [妇产科学];

学科分类号：

100211 ;

摘要：

To present fundamental data, spontaneous smiles and spontaneous laughs (smiles accompanied by vocal sounds) were cross-sectionally observed in 10 newborn infants and longitudinally observed in six infants. Unilateral spontaneous smiles were more common than bilateral smiles in neonates, but by 2 months almost all spontaneous smiles were bilateral. All spontaneous laughs were bilateral. "Spontaneous smile" and "Spontaneous laugh" might be different behaviors from the beginning. (C) 2005 Elsevier Ireland Ltd. All rights reserved.

引用

页码：61 / 66

页数：6

共 14 条

[1] NEONATAL SMILING IN REM STATES .4. PREMATURE STUDY [J].