Maeda N, Osawa K, Masuda T, Hakeda Y, Kumegawa M
Acta Anat (Basel). 1985;124(1-2):42-6. doi: 10.1159/000146093.
The formation of the anulospiral ending of Ia fibers in muscle spindles was investigated in the masseter muscle of developing mice. Before 15 days after birth, the complete anulospiral ending was not observed in almost all of the muscle spindles examined. With the growth of mice, the Ia fiber began to construct the spiral ending, and by the 40th postnatal day after weaning, almost all of the Ia fibers of the muscle spindles had complete coiled endings, though the formation still continued in some spindles. The continuous formation of anulospiral endings for a long period after weaning indicates that muscle spindle morphogenesis may be affected by muscle tension in the masseter muscle due to the movement activated after weaning.
在发育中小鼠的咬肌中研究了肌梭中Ia纤维环螺旋末梢的形成。出生后15天之前，在所检查的几乎所有肌梭中均未观察到完整的环螺旋末梢。随着小鼠的生长，Ia纤维开始构建螺旋末梢，到断奶后第40天，肌梭的几乎所有Ia纤维都有完整的盘绕末梢，尽管在一些肌梭中形成仍在继续。断奶后很长一段时间内环螺旋末梢的持续形成表明，由于断奶后激活的运动，咬肌中的肌肉张力可能会影响肌梭的形态发生。
