The influence of an acute bout of moderate-intensity cycling exercise on sensorimotor integration.,European Journal of Neuroscience

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The influence of an acute bout of moderate-intensity cycling exercise on sensorimotor integration.
European Journal of Neuroscience ( IF 2.7 ) Pub Date : 2020-07-21 , DOI: 10.1111/ejn.14909
Katlyn E Brown ₁ , Jason L Neva _{2,

3} , Cameron S Mang ₄ , Briana Chau ₅ , Larissa K Chiu ₅ , Beatrice A Francisco ₅ , William R Staines ₁ , Lara A Boyd _{5,

6}

Affiliation

Acute cycling exercise can modulate motor cortical circuitry in the non‐exercised upper‐limb. Within the primary motor cortex, measures of intracortical inhibition are reduced and intracortical facilitation is enhanced following acute exercise. Further, acute cycling exercise decreases interhemispheric inhibition between the motor cortices and lowers cerebellar‐to‐motor cortex inhibition. Yet, investigations into the effects of acute exercise on sensorimotor integration, referring to the transfer of incoming afferent information from the primary somatosensory cortex to motor cortex, are lacking. The current work addresses this gap in knowledge with two experimental sessions. In the first session, we tested the exercise‐induced changes in somatosensory and motor excitability by assessing somatosensory (SEP) and motor evoked potentials (MEPs). In the second session, we explored the effects of acute cycling exercise on short‐ (SAI) and long‐latency afferent inhibition (LAI), and afferent facilitation. In both experimental sessions, neurophysiological measures were obtained from the non‐exercised upper‐limb muscle, tested at two time points pre‐exercise separated by a 25‐min period of rest. Next, a 25‐min bout of moderate‐intensity lower‐limb cycling was performed with measures assessed at two time points post‐exercise. Acute lower‐limb cycling increased LAI, without modulation of SAI or afferent facilitation. Further, there were no exercise‐induced changes to SEP or MEP amplitudes. Together, these results suggest that acute exercise has unique effects on sensorimotor integration, which are not accompanied by concurrent changes in somatosensory or motor cortical excitability.

中文翻译：

中等强度的自行车运动急性发作对感觉运动整合的影响。

急性循环运动可以调节未锻炼的上肢的运动皮层电路。在初级运动皮层内，急性运动后，皮层内抑制的措施减少，皮层内促进作用增强。此外，急性自行车运动可减少运动皮层之间的半球间抑制，并降低小脑到运动皮层的抑制。然而，缺乏对急性运动对感觉运动整合的影响的研究，这涉及传入的传入信息从初级体感皮质向运动皮质的转移。当前的工作通过两次实验来解决这一知识差距。在第一节中，我们通过评估体感（SEP）和运动诱发电位（MEP）来测试运动引起的体感和运动兴奋性变化。在第二部分中，我们探讨了急性自行车运动对短期（SAI）和长期潜入传入抑制（LAI）以及传入促进的影响。在这两个实验中，均从未锻炼的上肢肌肉获得了神经生理学指标，并在锻炼前的两个时间点进行了测试，间隔了25分钟的休息时间。接下来，在运动后的两个时间点对中强度下肢骑行进行25分钟的测量。急性下肢循环可增加LAI，而无需调节SAI或传入促进。此外，运动引起的SEP或MEP振幅没有变化。总之，这些结果表明，急性运动对感觉运动的整合具有独特的影响，但并不伴随着体感或运动皮层兴奋性的同时变化。

更新日期：2020-07-21

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