Sakamoto Y
Department of Oral Anatomy II, Faculty of Dentistry, Tokyo Medical and Dental University, Japan.
J Morphol. 1996 Jan;227(1):113-9. doi: 10.1002/(SICI)1097-4687(199601)227:1<113::AID-JMOR10>3.0.CO;2-R.
The distribution of the endomysium, perimysium, and epimysium and their constituent connective tissue fiber types in the mature rat lateral pterygoid muscle was examined with the light microscope. The endomysium and perimysium were relatively thin and consisted mainly of reticular fibers. The epimysium was thicker than the intramuscular sheaths and consisted of both collagen and reticular fibers; however, the thickness and constitutent connective tissue fiber types of these sheaths varied regionally. Near the articular capsule and disc, the endomysium, perimysium, and epimysium were all thicker than in other regions of the muscle and consisted of collagen, reticular, and elastic fibers. The perimysium bound the bundles of muscle fibers together and frequently included blood vessels and nerves. As the superior head of the pterygoid muscle approached its insertion, sheaths of perimysium divided this head into smaller and smaller bundles of muscle fibers. In the inferior head, some of the perimysial sheaths and part of the epimysium were aponeurotic, and many muscle fibers attached to them. There were few such aponeurotic regions in the superior head.
运用光学显微镜对成熟大鼠翼外肌中肌内膜、肌束膜和肌外膜的分布及其组成的结缔组织纤维类型进行了研究。肌内膜和肌束膜相对较薄，主要由网状纤维组成。肌外膜比肌内鞘厚，由胶原纤维和网状纤维组成；然而，这些鞘的厚度和组成的结缔组织纤维类型在不同区域有所变化。在关节囊和关节盘附近，肌内膜、肌束膜和肌外膜均比肌肉其他区域厚，且由胶原纤维、网状纤维和弹性纤维组成。肌束膜将肌纤维束捆绑在一起，且常常包含血管和神经。当翼外肌上头接近其附着点时，肌束膜鞘将该头部分为越来越小的肌纤维束。在翼外肌下头，一些肌束膜鞘和部分肌外膜呈腱膜性，许多肌纤维附着于其上。在上头几乎没有这样的腱膜区域。
