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. 2018 Jul 24;12:508. doi: 10.3389/fnins.2018.00508

FIGURE 5.

FIGURE 5

Hypothetical model for the modulatory effect of iTBS over the motor cortex on the subsequent induction of spinal plasticity induced by PES. White circles in the spinal cord denote spinal motor neurons. Black circles denote Ia inhibitory interneurons. Pre-conditioning by using iTBS changes cortical excitability and the state of Ia inhibitory interneurons, which receive convergent input from the motor cortex. The pre-state changes in the interneurons enhance the induction and maintenance of spinal plasticity induced by PES. TA, tibialis anterior; SOL, soleus.