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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Pain. 2017 Apr;158(4):691–697. doi: 10.1097/j.pain.0000000000000816

Figure 2.

Figure 2

Mechanical hyperalgesia. Increased sensitivity to mechanical pinprick stimuli was observed at the HFS arm, both 20 minutes (T1) and 45 minutes (T2) after applying HFS. HFS also exerted a significant effect on the event-related potentials elicited by visual stimuli delivered to the HFS arm. The magnitude of the N1 wave of visual-evoked potentials elicited by stimulation of the HFS arm was significantly enhanced 20 minutes after applying HFS, but not 45 minutes after HFS. Asterisks indicate a p-values smaller than 0.05.