Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA; Department of Neurology, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA; Department of Structural & Cellular Biology, Tulane University School of Medicine, New Orleans, LA, USA; Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, LA, USA; Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Dental and Oral Medical Center, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka, Japan; Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka, Japan.
Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Ann Anat. 2024 Aug;255:152297. doi: 10.1016/j.aanat.2024.152297. Epub 2024 Jun 25.
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.
The anatomy of the BM and related structures was investigated in 15 cadaveric heads using a surgical microscope and histological analysis.
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.
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.
目前关于颊肌（BM）的解剖学知识，即上颌骨和下颌骨上的长而细的附着物和翼下颌缝（PMR），并没有得到对该肌肉进行解剖学研究的支持。因此，本研究旨在探讨 BM 及其相关结构的详细形态，并讨论其功能。
使用手术显微镜和组织学分析对 15 具尸体头颅中的 BM 和相关结构进行解剖学研究。
BM 的下纤维起源于一个小的磨牙后区（内斜线），与颞肌的深部肌腱共享一个共同的肌腱。BM 的上纤维起源于上颌结节。中纤维起源于翼钩。在任何标本中都没有发现 PMR，但由于肌纤维方向不同，BM 和咽上缩肌（SC）之间的边界是清晰的。BM 和 SC 之间有一些水平纤维连续。
我们的结果表明，有必要修订颊肌（上颌结节、颞肌联合肌腱和翼钩，而没有翼下颌缝）起源的既定描述。还需要注意的是，其一些纤维直接与 SC 融合。
