Desaki Junzo, Ezaki Taichi, Nishida Naoya
J Electron Microsc (Tokyo). 2010;59(3):243-50. doi: 10.1093/jmicro/dfp058. Epub 2009 Nov 30.
We examined by electron microscopy the innervation of muscle spindles in the internal oblique muscle of the mouse abdominal wall. In the equatorial region, in addition to the sensory innervation on individual intrafusal muscle fibers, sensory cross terminals were often observed between nuclear chain fibers. In the area from the juxtaequatorial region to the polar region, nuclear bag fibers were supplied by trail and plate-type motor endings, while nuclear chain fibers were innervated by sensory endings, being probably secondary sensory endings. From these findings, it is clear that the innervation patterns differ between two types of intrafusal muscle fibers.
我们通过电子显微镜检查了小鼠腹壁内斜肌中肌梭的神经支配情况。在赤道区域，除了单个梭内肌纤维上的感觉神经支配外，在核链纤维之间还经常观察到感觉性交叉终末。在近赤道区域到极区的区域，核袋纤维由尾状和平板型运动终末提供神经支配，而核链纤维由感觉终末支配，可能是次级感觉终末。从这些发现可以清楚地看出，两种类型的梭内肌纤维的神经支配模式不同。
