Saito Hiroshi, Itoh Ichizoh
Department of Morphological Biology, Division of Oral Anatomy, Ohu University School of Dentistry, 31-1 Misumido, Tomita-cho, Koriyama, Fukushima 963-8611, Japan.
Ann Anat. 2007;189(3):261-7. doi: 10.1016/j.aanat.2006.10.002.
The arrangement of the lingual muscles in the interior of the human tongue, particularly the course of the posterior muscle bundles of the styloglossus, was studied by gross anatomical examination and SEM, and its relationship with tongue functions was considered. The styloglossus divided into anterior and posterior fiber bundles. The bilateral anterior fiber bundles ran anteriorly, and fused at the median region of the lower surface of the tongue, forming a large arched structure. The posterior bundles divided into 10 or more smaller bundles and entered the interior of the tongue. These muscle bundles passed through the spaces between the inferior longitudinal and genioglossus and inserted in the lingual septum, forming a small arched structure. These posterior muscle bundles passed near the midpoint between the central third and dorsal third of the line between the mental spine and the dorsal surface of the tongue in the upper half of the root of the tongue, showing a multilayer structure. In many of the areas in which posterior muscle bundles were distributed, muscle bundles in the tongue were arranged along the posterior muscle bundles of the styloglossus, glossopharyngeal bundles of the superior pharyngeal constrictor muscle, and transverse muscle of the tongue from the deep layer to the dorsal surface of the tongue.
通过大体解剖检查和扫描电子显微镜对人舌内部舌肌的排列，尤其是茎突舌肌后肌束的走行进行了研究，并探讨了其与舌功能的关系。茎突舌肌分为前后纤维束。双侧前纤维束向前走行，在舌下面的正中区域融合，形成一个大的拱形结构。后束分为10个或更多较小的束并进入舌内部。这些肌束穿过舌下纵肌和颏舌肌之间的间隙，插入舌中隔，形成一个小的拱形结构。这些后肌束在舌根上半部分舌背与颏棘连线的中央三分之一与背侧三分之一之间的中点附近通过，呈现多层结构。在许多后肌束分布的区域，舌内肌束从舌深层到舌背沿着茎突舌肌后肌束、咽上缩肌的舌咽束和舌横肌排列。
