Klueber K M, Langdon H L, Barnwell Y
Acta Morphol Neerl Scand. 1979 Dec;17(4):301-10.
The attachments, courses and interrelationships of the transverse and vertical intrinsic muscle masses of the tongue were examined in 28 fifteen-week fetal specimens. Observations were made from 30-micron sections cut through the tongue in one of the three standard planes of section. Both sets of muscululature are qualitatively well-developed by this time period in fetal life. The transverse fibers were found to occupy the entire length of the tongue. They attach to the lamina propria of the lateral aspect of the body of the tongue and, in the root, to perimysial and adventitial connective tissue. In addition, some fibers were observed to be confluent with the mm. palatoglossus, tonsilloglossus and pharyngis superior. Medially, transverse fibers were found for the most part to terminate in the dense ventral aspect of the median septum. Vertical fibers are present from a point slightly posterior to the tip of the tongue to the level of the foramen cecum, beyond which they become sparse. All vertical fibers attach superiorly to the dorsal lamina propria. In the free part of the body, their ventral attachment, likewise, is to lamina propria. In the middle part of the tongue and, to a greater extent, in the root (as the inferior and lateral free surface decreases) these fibers attach in either the fascial plane underlying the transverse component or to the perimysium of longitudinally-running muscle bundles.
在28个15周龄的胎儿标本中，对舌的横向和纵向固有肌块的附着、走行和相互关系进行了检查。观察是在三个标准切面之一中切取的30微米厚的舌切片上进行的。在胎儿发育的这个阶段，两组肌肉组织在质量上都发育良好。发现横向纤维占据舌的全长。它们附着于舌体侧面的固有层，在舌根处附着于肌束膜和外膜结缔组织。此外，观察到一些纤维与腭舌肌、扁桃体舌肌和咽上肌融合。在中线，横向纤维大多终止于正中隔致密的腹侧部分。纵向纤维从舌尖稍后方的一点延伸至盲孔水平，在盲孔水平以上则变得稀疏。所有纵向纤维均向上附着于背侧固有层。在舌体的游离部分，它们的腹侧附着同样是固有层。在舌的中部，在更大程度上是在舌根处（随着下侧和外侧游离面减小），这些纤维附着于横向成分下方的筋膜平面或纵向走行的肌束的肌束膜。
