Video Image Analysis of Suckling Movements in Healthy Infants

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  • ビデオ画像解析による正常乳児における吸啜運動の観察

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Suckling behavior during infancy is considered to affect development of masticatory function and growth of masticatory organs. Evaluation of suckling movement is considered necessary to support successful breastfeeding, which promotes subsequent healthy development of masticatory function and jaw growth. Noninvasive sucking evaluation methods that do not require special equipment are necessary in clinical situations, and visual analysis of suckling movements using obtained images may be useful for evaluating suckling behavior and providing support. In this study, the characteristics of suckling patterns during breastfeeding were clarified using recorded video images. The subjects were 13 healthy breastfed term infants without complications such as asphyxia or anomalies. Suckling movements during routine breastfeeding were video recorded within 1 week and then 1, 3, and 5 months after birth (total 4 sessions). Next, kinetic analysis of the recorded mandibular movements was performed using 2-dimensional motor analysis software. The following findings were noted.1.As for suckling rhythm, alterations between a continuous suckling period (burst) and suspension of suckling (pause) disappeared with age.2.Mandibular shift during suckling movements increased with age.3.During suckling movements, mouth-closing speed was faster than mouth-opening speed, though both increased with age.4.The time period of a single suckling cycle did not significantly change with age. At the age of 3 months, individual differences were minimal and stable suckling behavior was observed in all of the subjects.5.As a basic technique to establish a noninvasive method to observe and establish infant suckling movements, the present method of video recording and use of motion analysis software with the same infants over time was useful to clarify changes in suckling pattern with growth.

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