Bhatnagar K P
Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Kentucky 40292.
J Anat. 1994 Feb;184 ( Pt 1)(Pt 1):171-6.
The unusual occurrence of skeletal muscle in the pineal gland of the bat Rhinopoma microphyllum is described. Individual muscle fibres were centrally placed and were incompletely encapsulated by a labyrinthine network of widened spaces filled with electron-dense material. The 2.4 micron long sarcomeres consisted of well developed A, I, H, M, and Z bands. A few myofibrils were oriented transversely within the same fibre. T system components, mitochondria and glycogen appeared normally distributed. Unmyelinated nerve bundles impinged upon the fibre but neuromuscular junctions were not observed. Several possible sources of origin for this tissue in the pineal gland are reviewed.
描述了小叶菊头蝠松果体中骨骼肌的异常出现情况。单个肌纤维位于中央，被充满电子致密物质的迷宫状扩大间隙网络不完全包裹。2.4微米长的肌节由发育良好的A带、I带、H带、M带和Z带组成。同一纤维内有一些肌原纤维横向排列。T系统成分、线粒体和糖原分布正常。无髓神经束与纤维接触，但未观察到神经肌肉接头。综述了松果体中该组织的几种可能起源。
