Study of gamma motoneuron activities of masticatry muscle in craniofacial asymmetry cases.

颅面不对称病例咀嚼肌γ运动神经元活动的研究。

• 批准号: 08457567
• 负责人: HANADA Kooji
• 金额: $ 4.99万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08457567/
• 关键词: craniofacial asymmetry; TVR; gamma motonueron; 顎変形症; 咀嚼筋誘発筋電図; 咬合接触状態

The purpose of this study was to investigate the relationship between facial morphology and gamma motoneuron activities of masticatory muscle in craniofacial asymmetry cases.In this study, we evaluated muscle activities of masseter and temporal muscle which were induced by tonic vibration in craniofacial asymmetry cases and healthy volunteer subjects, and the following results were obtained :Regarding relationship between mandibular deviation and muscle activities of temporal muscle :1. TVR index had a tendency to be lower on mandiblar deviation side than on the other side in all subjects, and difference of both sides TVR index had signifcantly negative correlation with that in madibular deviation.2. TVR index became bigger when mandible was moved laterally to the opposite direction to the evaluated side, and TVR index was the lowest at the mandibular position in the path of closure where the distance between the upper and lower incisors was 11 mm.Regarding relationship between mandibular deviation and muscle activities of masseter muscle :1. TVR index had a tendency to be lower in the mandibular deviation side than in the other side in craniofacial aymmetry cases.2. Difference of both sides TVR index had signifcantly negative correlation with that in madibular deviation.These results suggested that madibular deviation could have influences on difference of both sides in the gamma motoneuron activities in cases with craniofacial asymmetry

本研究旨在探讨颅面不对称患者的面部形态与咀嚼肌γ运动神经元活动的关系，通过对颅面不对称患者和健康志愿者的咀嚼肌和颞肌在强直性振动刺激下的肌电活动进行评价，得到以下结果：关于下颌偏斜与颞肌肌电活动的关系：1.所有受试者下颌偏斜侧TVR指数均低于对侧，且双侧TVR指数的差异与下颌偏斜的差异呈显著负相关.当下颌骨向评价侧的反方向侧移时，TVR指数逐渐增大，在上下切牙距离为11 mm的闭合路径中下颌位置TVR指数最低。在颅面不对称病例中，下颌偏斜侧的TVR指数有低于对侧的趋势.双侧TVR指数的差异与下颌偏斜的差异呈显著负相关，提示下颌偏斜可影响颅面不对称患者双侧伽玛运动神经元活动的差异

项目成果

山田一尋 他5名: "顎関節症を伴う不正咬合患者の側面顎顔面形態と咬合力の関連に関する研究" 日本顎口腔機能学会雑誌. 4巻. 59-65 (1997)

Kazuhiro Yamada等5人：“颞下颌关节疾病咬合不正患者的颌面侧面形态与咬合力的关系研究”日本口腔颌面功能学会杂志4. 59-65 (1997)。