Perciavalle Valentina, Coco Marinella, Alagona Giovanna, Maci Tiziana, Perciavalle Vincenzo
Department of Formative Processes, University of Catania, Catania, Italy.
Somatosens Mot Res. 2010;27(3):106-10. doi: 10.3109/08990220.2010.507102.
Gender differences in cortical excitability have been detected by using transcranial magnetic stimulation (TMS). The present study was carried out to compare the effects of high blood lactate levels, induced by performing a maximal exhausting exercise, on the excitability of the primary motor cortex in young male and female athletes. The study was carried out on 21 young males and 20 females from the Middle Distance Track Team of our university. Before the exercise, at the end, as well as 5 and 10 min after the conclusion, venous blood lactate and glucose were measured and excitability of the motor cortex was evaluated by using TMS. We observed a similar enhancement of excitability of primary motor cortex, concomitantly with an increase of blood lactate, in both young male and female athletes. However, the improvement was significantly higher (p < 0.05) in women (37.4% +/- 3.97) than in men (42.0% +/- 6.43), suggesting a greater sensitiveness of female cerebral cortex to blood lactate.
通过经颅磁刺激（TMS）已检测到皮质兴奋性的性别差异。本研究旨在比较由进行最大耗竭运动诱导的高血乳酸水平对年轻男性和女性运动员初级运动皮质兴奋性的影响。该研究对我校中长跑队的21名年轻男性和20名女性进行。在运动前、运动结束时以及运动结束后5分钟和10分钟，测量静脉血乳酸和葡萄糖，并使用TMS评估运动皮质的兴奋性。我们观察到，在年轻男性和女性运动员中，初级运动皮质的兴奋性均有类似增强，同时血乳酸增加。然而，女性（37.4%±3.97）的改善明显高于男性（42.0%±6.43）（p<0.05），表明女性大脑皮质对血乳酸更敏感。
