Abstract：
BACKGROUND: Current anatomical knowledge of the origin of the bucinator muscle (BM), i.e., long thin attachments on the maxilla and mandible and the pterygomandibular raphe (PMR), is not supported by anatomical dissection of this muscle. The aim of this study was therefore to investigate the detailed morphology of the BM and associated structures and to discuss its function.
METHODS: The anatomy of the BM and related structures was investigated in 15 cadaveric heads using a surgical microscope and histological analysis.
RESULTS: The inferior fibers of the BM originated from a small retromolar area (internal oblique line), which shared a common tendon with the deep tendon of the temporalis. The superior fibers of the BM originated from the maxillary tuberosity. The middle fibers originated the pterygoid hamulus. No PMR was identified in any of the specimens, but the border between the BM and superior pharyngeal constrictor muscle (SC) was clear because the muscle fibers followed different directions. Some horizontal fibers were continuous between the BM and SC.
CONCLUSIONS: Our results suggest the need to revise established accounts of the origins of the bucinator (the maxillary tuberosity, conjoint tendon of the temporalis, and pterygoid hamulus without a pterygomandibular raphe. It also needs to be noted that some of its fibers merge directly with the SC.
METHODS: The anatomy of the BM and related structures was investigated in 15 cadaveric heads using a surgical microscope and histological analysis.
RESULTS: The inferior fibers of the BM originated from a small retromolar area (internal oblique line), which shared a common tendon with the deep tendon of the temporalis. The superior fibers of the BM originated from the maxillary tuberosity. The middle fibers originated the pterygoid hamulus. No PMR was identified in any of the specimens, but the border between the BM and superior pharyngeal constrictor muscle (SC) was clear because the muscle fibers followed different directions. Some horizontal fibers were continuous between the BM and SC.
CONCLUSIONS: Our results suggest the need to revise established accounts of the origins of the bucinator (the maxillary tuberosity, conjoint tendon of the temporalis, and pterygoid hamulus without a pterygomandibular raphe. It also needs to be noted that some of its fibers merge directly with the SC.
摘要：
背景：目前关于颊肌（BM）起源的解剖学知识，即，上颌骨和下颌骨以及翼下颌中段（PMR）上的细长附件，不支持这种肌肉的解剖。因此，这项研究的目的是研究BM和相关结构的详细形态并讨论其功能。
方法：使用手术显微镜和组织学分析对15具尸体头部的BM和相关结构进行了解剖研究。
结果：BM的劣质纤维起源于较小的磨牙后区域（内部斜线），与颞肌的深肌腱共享一个共同的肌腱。BM的上纤维起源于上颌结节。中间纤维起源于翼状肌。在任何标本中都没有发现PMR，但是BM和咽上收缩肌（SC）之间的边界清晰，因为肌纤维遵循不同的方向。一些水平纤维在BM和SC之间是连续的。
结论：我们的结果表明，有必要修改有关颊肌起源的既定说法（上颌结节，颞关节肌腱,和没有翼状下颌中缘的翼状突起。还需要注意的是，它的一些纤维直接与SC合并。
方法：使用手术显微镜和组织学分析对15具尸体头部的BM和相关结构进行了解剖研究。
结果：BM的劣质纤维起源于较小的磨牙后区域（内部斜线），与颞肌的深肌腱共享一个共同的肌腱。BM的上纤维起源于上颌结节。中间纤维起源于翼状肌。在任何标本中都没有发现PMR，但是BM和咽上收缩肌（SC）之间的边界清晰，因为肌纤维遵循不同的方向。一些水平纤维在BM和SC之间是连续的。
结论：我们的结果表明，有必要修改有关颊肌起源的既定说法（上颌结节，颞关节肌腱,和没有翼状下颌中缘的翼状突起。还需要注意的是，它的一些纤维直接与SC合并。
