The innervation of the medial pterygoid muscle can be divided into low branch(38 cases, 63%)and high branch types(22 cases, 37%).

翼内肌由下领神经前干发出的分支支配，可分成低分支型（38例，占63％）和高分支型（22例，占37％）两型。

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Results The main masticatory muscles of miniature pigs include masseter muscle, temptory muscle, lateral pterygoid muscle, medial pterygoid muscle and zygomaticomandibular muscle.

结果小型猪主要咀嚼肌包括嚼肌、颞肌、翼内肌、翼外肌及颧弓下颌肌；

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Conclusion The lateral pterygoid muscle, styloid process, pterygoid process and its medial, lateral pterygoid plate were important anatomical marks for CT imaging diagnosis.

结论翼外肌、茎突、翼突及其内、外侧板是CT等影像诊断的重要解剖学标志。

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