Moustafa F A
Department of Anatomy, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
Acta Anat (Basel). 1989;135(1):31-40. doi: 10.1159/000146719.
The deltoid and gluteus maximus of the desert rat and the albino rat were examined histochemically for the distribution of succinic dehydrogenase (SDH) and cholinesterase (ChE). SDH activity showed that the deltoid and gluteus maximus muscles of the two animals consisted of three types of muscle fibres, with a predominance of muscle fibres that have higher SDH activity in both the deltoid and gluteus maximus muscles of the desert rat than in the albino rat. The mean diameter of all muscle fibres in the deltoid and gluteus maximus muscles and their ratios to the average body weight were determined in both animals. The desert rat showed a statistically significant increase in those ratios compared with the corresponding ratios for the albino rat. ChE activity showed that the deltoid and gluteus maximus muscles are richly innervated by intensely positive ChE motor end-plates with a predominance of plaque-like terminals. The mean diameters of the end-plates and the ratios of these diameters to the diameter of the muscle fibres together with their ratios to the body weight were determined. A correlation between these values and the histological findings is proposed.
对荒漠大鼠和白化大鼠的三角肌和臀大肌进行了组织化学检查，以确定琥珀酸脱氢酶（SDH）和胆碱酯酶（ChE）的分布。SDH活性表明，这两种动物的三角肌和臀大肌均由三种类型的肌纤维组成，且在荒漠大鼠的三角肌和臀大肌中，具有较高SDH活性的肌纤维占优势，相比之下，白化大鼠的这种肌纤维较少。测定了两种动物三角肌和臀大肌中所有肌纤维的平均直径及其与平均体重的比值。与白化大鼠的相应比值相比，荒漠大鼠的这些比值在统计学上有显著增加。ChE活性表明，三角肌和臀大肌由强烈阳性的ChE运动终板丰富地支配，以斑块状终末为主。测定了终板的平均直径及其与肌纤维直径的比值以及它们与体重的比值。提出了这些值与组织学结果之间的相关性。
