Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan.
Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-Ku, Tokyo, 113-8519, Japan.
Anat Sci Int. 2023 Jul;98(3):448-453. doi: 10.1007/s12565-023-00709-7. Epub 2023 Mar 6.
The attachment of the palatopharyngeus extended from the posterior end of the thyroid cartilage to the posterior margin of the inferior constrictor attachment that might contribute to successive swallowing movements. Laryngeal elevation is essential for proper swallowing and breathing. Recently, clinical research has demonstrated that the palatopharyngeus, a longitudinal muscle of the pharynx, is involved in the elevation of the larynx. However, the morphological relationship between the larynx and palatopharyngeus remains unclear. In the present study, we analyzed the attachment site and characteristics of the palatopharyngeus in the thyroid cartilage. We evaluated 14 halves of seven heads from Japanese cadavers (average age: 76.4 years); 12 halves, anatomically and two halves histologically. A part of the palatopharyngeus, which originated from the inferior aspect of the palatine aponeurosis, was attached to the inner and outer surfaces of the thyroid cartilage through collagen fibers. The attachment area extends from the posterior end of the thyroid cartilage to the posterior margin of the attachment site of the inferior constrictor. The palatopharyngeus may elevate the larynx with the suprahyoid muscles and contribute to successive movements of swallowing with surrounding muscles. Based on our findings and previous studies, palatopharyngeus with various muscle bundle directions may be essential for the coordination of continuous swallowing events.
腭咽肌的附着从甲状软骨的后端延伸到下咽缩肌附着的后缘，可能有助于连续吞咽运动。喉的抬高对于正常吞咽和呼吸至关重要。最近的临床研究表明，咽的纵行肌腭咽肌参与了喉的抬高。然而，喉和腭咽肌之间的形态关系尚不清楚。在本研究中，我们分析了甲状软骨中腭咽肌的附着部位和特征。我们评估了来自日本尸体的七个头颅的 14 个半（平均年龄：76.4 岁）；12 个半是解剖学的，2 个半是组织学的。一部分腭咽肌起源于腭帆腱膜的下表面，通过胶原纤维附着在甲状软骨的内、外表面。附着区域从甲状软骨的后端延伸到下咽缩肌附着的后缘。腭咽肌可能与舌骨上肌群一起抬高喉，有助于与周围肌肉一起进行连续吞咽运动。基于我们的发现和以前的研究，具有各种肌束方向的腭咽肌可能对连续吞咽事件的协调至关重要。
