EMG Study of the Lateral Pterygoid Muscles on Isometric Horizontal Mandibular Forces

翼外肌对等距水平下颌力的肌电图研究

• 批准号: 02670884
• 负责人: MAEDA Teruta
• 金额: $ 1.47万
• 依托单位: Osaka Dental University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02670884/
• 关键词: Lateral pterygoid muscle; Electromyography; Isometric contraction; Power spectrum; Muscle length; Muscle tension

Experiment 1Six male subjects were studied to determine the effect on the ENG power spectra of shortening the inferior head of the lateral pterygoid muscle (ILPT) during isometric protrusive and lateral protrusive contraction at three different muscle lengths.Among all muscle lengths, no significant difference in mean frequency of ENG power spectra was seen on either side of the ILPT during isometric protrusive contraction. This result is similar to that for the digastric muscle during isometric under opening at various jaw positions, but differs from those for the temporal and masseter muscles at during isometric clenching at various jaw positions.Experiment 2The relation between frequency and amplitude on electromyograph of masseter, posterior temporal, anterior digastric and lateral pterygoid muscles on six to twenty-four normal human adults were studied during isometric contractions, at different force levels and at different muscle lengths. ENG amplitude was inversely proportional to frequency at different force levels in four muscles. However, at different muscle length, the direct proportion was shown the relation between frequency and amplitude in the masseter and temporal muscles, but there were inversely correlations between them in the digastric and pterygoid muscles.It was speculated that this lack of significant mean frequency change and correlation between frequency and amplitude at different muscle lengths is characteristic of the EMGs of jaw depressor muscles including inferior lateral pterygoid muscle.

实验一研究了6名男性受试者在三种不同肌长下，缩短翼外肌下头（ILPT）对等长伸展和外侧伸展收缩时眼震电图（ENG）功率谱的影响，在所有肌长下，两侧ILPT等长伸展收缩时眼震电图（ENG）功率谱的平均频率无显著性差异。这一结果与不同颌位等长张口时的二腹肌相似，而与不同颌位等长紧咬时的颞肌和咬肌不同。实验2咬肌、颞后肌、研究了6 - 24名正常成人在等长收缩期间的二腹肌前肌和翼外肌，在不同的力量水平和不同的肌肉长度下。在四块肌肉中，在不同的力水平下，ENG振幅与频率成反比。而在不同肌长时，咬肌和颞肌的频率与振幅的关系呈正比，二腹肌和翼肌肌电之间呈负相关，推测这种肌长不同时的平均频率变化和频率与振幅之间的相关性是包括下外侧肌在内的降颌肌肌电的特征翼肌

项目成果

Shinji UCHIDA, et al.: "Electromyographic studies on sustained mandibular isometric lateral protrusive contraction" J Jpn Assoc Cranio-Mandibular Orthop. 4. 9-13 (1991)

Shinji UCHIDA 等人：“持续下颌等长侧向前伸收缩的肌电图研究”J Jpn Assoc Cranio-Mandibular Orthop。

内田 慎爾,川野 晃,前田 照太,井上 宏他: "持続的等尺性側方押し出し運動における咀嚼筋の経時的変化について" 日本顎頭蓋機能研究会誌. 4. 9-13 (1991)

Shinji Uchida、Akira Kawano、Teruta Maeda、Hiroshi Inoue 等：“持续等长横向挤压运动期间咀嚼肌的时间变化”日本颌下颌功能研究学会杂志 4. 9-13 (1991)。

Teruta MAEDA, et al.: "Relation between frequency and amplitude on electromyogram of the masticatory muscles --Influence of tension and length of muscles--" J Jpn Soc TMJ. 3. 182-183 (1991)

Teruta MAEDA 等人：“咀嚼肌肌电图频率和振幅之间的关系——张力和肌肉长度的影响——”J Jpn Soc TMJ。

内田 慎爾,高橋 礼太郎,前田 照太,井上 宏他: "外側翼突下頭の筋長のEMGパワ-スペクトルの周波数に及ぼす影響について" 日本補綴歯科学会雑誌. 32. 919-922 (1991)

Shinji Uchida、Reitaro Takahashi、Teruta Maeda、Hiroshi Inoue 等人：“翼下小头肌肉长度对肌电图功率谱频率的影响”日本口腔修复学会杂志 32. 919-922（ 1991））

内田 慎爾,前田 照太,井上 宏: "等尺性水平押し出し運動時の外側翼突筋の筋電図" 日本顎頭蓋機能研究会誌. 3. 67-68 (1990)

Shinji Uchida、Teruta Maeda、Hiroshi Inoue：“等长水平推动运动时翼状肌外侧肌的肌电图”日本颌下颌功能研究学会杂志 3. 67-68 (1990)。