Morphological characteristics of skeletal muscles in relation to gender
Morphological characteristics of skeletal muscles in relation to gender
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DOI：
10.1007/bf03324508
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发表时间：
2003-06-01
影响因子：
4
通讯作者：
Thompson, LV
中科院分区：
文献类型：
--
作者：
Fox, J;Garber, P;Thompson, LV
背景和目标：本研究的目的是确定是否有性别相关的差异，在年轻的成年和老年Fischer 344/Brown Norway F1大鼠的比目鱼肌和胫骨前肌的形态特征。研究方法：我们测试了1）这些肌肉的纤维类型组成之间是否存在性别相关的差异，以及2）单个肌纤维的横截面积是否表现出性别相关的差异，男性纤维大于女性纤维。结果如下：性别差异没有发现比目鱼肌和胫骨前肌的纤维类型组成，但存在于胫骨前肌的单骨骼纤维横截面积。在12（16%）和30（5%）月龄时，女性I型纤维的横截面积大于男性。与此相反，12个月大的男性的IIa型纤维的横截面积大于12个月大的女性。在两个年龄组中，IIb型纤维的横截面积在性别之间没有显著差异。在比目鱼肌，30个月大的男性有较大的单纤维横截面积的纤维类型I和IIa。在12个月的年龄，I型纤维从女性大于男性。结论：我们的研究结果表明，性别相关的差异存在于个体骨骼纤维的大小从比目鱼肌和胫骨前肌，他们可能会影响新陈代谢和适应性反应的康复计划。（C）2003年，Editrice Kurtis
Background and aims: The aim of this study was to ascertain whether there are gender-related differences in the morphological characteristics of the soleus and tibialis anterior muscles in young adult and old Fischer 344/Brown Norway F1 rats. Methods: We tested 1) whether there was a gender-related difference between the fiber type composition of these muscles, and 2) whether the cross-sectional area of individual muscle fibers demonstrated gender-associated differences, fibers from males being larger than fibers from females. Results: Gender differences were not found in the fiber type composition of the soleus and tibialis anterior muscles, but were present in the single skeletal fiber cross-sectional area of the tibialis anterior muscle. The cross-sectional area of type I fibers in females was greater than that in males at both 12 (16%) and 30 (5%) months of age. In contrast, the cross-sectional area of type IIa fibers of 12-month-old males was larger than that of 12-month-old females. No significant differences between genders were found for the cross-sectional area of type IIb fibers in either age group. In the soleus muscle, 30-month-old males had larger single fiber cross-sectional areas of both fiber types I and IIa. At 12 months of age, type I fibers from females were larger than those from males. Conclusions: Our findings indicate that gender-related differences exist in the size of individual skeletal fibers from the soleus and tibialis anterior muscles and that they may influence metabolism and the adaptive response to rehabilitation programs. (C)2003, Editrice Kurtis