LOW-LEVEL INTERMITTENT QUADRICEPS ACTIVITY DURING TRANSCRANIAL DIRECT CURRENT STIMULATION FACILITATES KNEE EXTENSOR FORCE-GENERATING CAPACITY

作者：Washabaugh Edward P; Santos Luciana; Claflin Edward S; Krishnan Chandramouli^*

来源：Neuroscience, 2016, 329: 93-97.

DOI：10.1016/j.neuroscience.2016.04.037

• noninvasive brain stimulation
• functional specificity
• metaplasticity
• transcranial magnetic stimulation
• voluntary torque
• muscle strength

Anodal transcranial direct current stimulation (tDCS) is known to increase the force-generating capacity of the skeletal muscles. However, when tDCS is concurrently combined with a motor task, interference may occur that hinders tDCS effects. Here, we tested the interaction and time course of tDCS effects on force production when paired with a low-level force-matching task. Twenty-two subjects were randomized into two groups: tDCS-Matching and tDCS-Resting. Each group received tDCS and a sham stimulation, separated by one week. Maximal knee extensor and flexor torques were measured before and up to twenty-five minutes following the stimulation. The tDCS-Matching group produced greater knee extension torques relative to sham when compared with the tDCS-Resting group. There was no significant effect for knee flexion. This suggests that interference does not occur for force production tasks when tDCS is combined with a motor task. Rather, the task appears to aid and isolate the effects to the muscle groups involved in the task.

• 出版日期2016-8-4