Vilmann A, Vilmann H, Kirkeby S
Department of Oral Function and Physiology, Royal Dental College, Copenhagen, Denmark.
Acta Anat (Basel). 1989;135(4):341-3. doi: 10.1159/000146778.
Cross-sections of normal digastric, temporalis and masseter muscles from 7- and 30-week-old mice were studied for centrally positioned nuclei. Such nuclei were inhomogeneously distributed throughout each muscle and varied markedly between specimens. The incidence of centrally positioned nuclei in the digastric muscle (mean +/- SD: 0.029 +/- 0.015, n = 25) was significantly higher (p less than 0.001) than that in the temporalis (mean +/- SD: 0.011 +/- 0.010, n = 25) and masseter muscles (mean +/- SD: 0.005 +/- 0.007, n = 9), but did not differ between the two latter muscles (p = 0.41). Furthermore, the frequency in a given muscle was apparently age-independent. A connection between fiber type and centrally positioned nuclei is suggested.
对7周龄和30周龄小鼠的正常二腹肌、颞肌和咬肌横截面进行研究，以观察中央定位核。这些核在每块肌肉中分布不均匀，且样本之间差异显著。二腹肌中中央定位核的发生率（平均值±标准差：0.029±0.015，n = 25）显著高于颞肌（平均值±标准差：0.011±0.010，n = 25）和咬肌（平均值±标准差：0.005±0.007，n = 9）（p < 0.001），但后两块肌肉之间无差异（p = 0.41）。此外，特定肌肉中的频率显然与年龄无关。提示纤维类型与中央定位核之间存在联系。
