Experimental study for development of rabbit masticatory system depending on the style of sucking

不同吸吮方式对家兔咀嚼系统发育的实验研究

基本信息

批准号：
08835016
负责人：
NAGATA Junko
金额：
$ 1.6万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08835016/
关键词：
EMG Jaw movement Functional development Sucking Breast feeding Bottle feeding ウサギ顎運動径路離乳

项目摘要

To investigate the difference of developmental degree of masticatory function depending on sucking style such as breast or bottle feeding with elastic nipple, four infant rabbits in each group, had been fed for three weeks in this study.EMG of masseter muscle, digastric, styloglossus, genioglossus, mylohyoid and geniohyoid muscles with breast and bottle feeding, and x-ray movie when eating solid food for evaluating the tongue and jaw movement had been carried out simultaneously. Whole data gathered had been analyzed and discussed.The summary of results are as follows.1.The diference of developmental degree of feeding function1)Muscle activity :(1)Cycle length of muscle activity was longer in bottle feeding group than in breast feeding group.(2)Time lags activity : Time lags of activity onsets of digastric muscle from masseter muscle, and that of geniohyoid muscle from mylohyoid muscle were shorter in bottle feeding group.Muscle activity integration : Integration of masseter muscle was … More higher in breast feeding than in bottle feeding, on the other hand, digastric muscle was lower in breast feeding than in bottle feeding. Genioglossus and mylohyoid muscles were higher in bottle feeding group than in breast feeding group.2)Tongue and jaw movement : The bertical dimension of jaw movement were longer in breast than in bottle feeding. The horizontal dimension of tongue movment were longer in bottle feeding than in breast feeding.2.The difference of developmental degree of masticatory function1)Muscle activity :(1)Cycle length of muscle activity was linger in bottle feeding group than in breast feeding group.(2)Muscle activity integration : Integration of masseter muscle was higher in breast feeding than in bottle feeding. The reciprocity of digastric, masseter, styloglossus, gemioglossus muscles activity were lower in bottle feeding than in normal feeding.2)Jaw and tongue movment : The length of intake phase was shorter with small amount of jaw movement in normal feeding group than in bottle feeding group, on the contrally, the length of chewing phase was longer with large amount of jaw movement in normal feeding group than in bottle feeding group.These results that the difference of developmental degree of rabbit masticatory function and jaw movement depending on the style of sucking had existed which represents the deficiency of functional development of masticatory organ in case of bottle feeding rabbit. Less

为了探讨不同吸吮方式（如母乳喂养或弹力奶嘴奶瓶喂养）咀嚼功能发育程度的差异，本研究每组4只幼兔，喂养3周。咬肌、二腹肌、茎突舌肌、肌电图同时进行了母乳喂养和奶瓶喂养时的颏舌肌、下颌舌骨肌和颏舌骨肌的检查，以及吃固体食物时评估舌头和下颌运动的 X 光片，对收集到的全部数据进行了分析和分析。结果总结如下：1.喂养功能发育程度的差异1）肌肉活动：（1）奶瓶喂养组肌肉活动周期长度长于母乳喂养组。（2）活动时滞：在奶瓶喂养组中，二腹肌与咬肌的活动开始时间滞后，颏舌骨肌与下颌舌骨肌的活动开始时间滞后较短。肌肉活动整合：乳房中咬肌的整合较高另一方面，母乳喂养组的二腹肌低于奶瓶喂养组，颏舌肌和下颌舌骨肌高于母乳喂养组。2）舌头和下颌运动：舌头和下巴的垂直尺寸。母乳喂养下颌运动比奶瓶喂养长，舌头运动的水平长度奶瓶喂养比母乳喂养长。2.咀嚼功能发育程度的差异1）肌肉活动：（1）咀嚼周期长度。 (2)肌肉活动整合度:母乳喂养组咬肌整合度高于奶瓶喂养组,二腹肌、咬肌、茎突舌肌、宝石舌肌活动度较低。 2）下颌和舌头运动：正常喂养组的进食阶段长度较短，下颌运动量较小，相反，正常喂养组的下颌运动量较小。与奶瓶喂养组相比，正常喂养组咀嚼期长度较长，颌部运动量较大。结果表明，不同吸吮方式的家兔咀嚼功能和颌部运动发育程度存在差异，这表明兔的咀嚼功能和颌部运动发育程度存在差异。奶瓶喂养兔子的咀嚼器官功能发育较差。