Figure 2. Experimental protocol.
First, after detecing the sensory threshold and after 3 min of rest, the
Baseline NWR threshold was measured. After another 5 min of rest,
tVNS/sham stimulation was performed for 2 min, and NWR thresholds were
measured immediately after tVNS (Post 0), 10 min later (Post 10), and 30
min later (Post 30), respectively.