Fig. 2.  The mean GFP curves of all subjects (N = 20) depict the power distribution (A ) over the LH and RH after stimulation of the median and ulnar nerves of both hands. LH MED or LH ULN indicate the response in the LH after median or ulnar stimulation, for the RH the same meaning. B  and C  depict the three mean GFP curves after median and ulnar stimulation of the patient groups. The UH curve (black), the AH curve (red), and the AH after the anesthetic block (blue) are depicted. Vertical is the power in fT²(femtoTesla²) and horizontal is the time in milliseconds (0–400 MS). AH = affected hemisphere; AH-block = affected hemisphere after a local block; GFP = global field power; GFP MED and GFP ULN = GFP after median and ulnar nerve stimulation, respectively; LH = left hemisphere; RH = right hemisphere; UH = unaffected hemisphere.