When stimulus strength was adjusted to induce equivalent levels of TSSP, no differences in activation of pain-related brain regions occurred across NC and FM groups.
In adults, the current strength was adjusted according to the patient's comfortable hearing perception; in children (i.e., during general anesthesia), a standard value of 200 mA was used.
Stimulation strength was adjusted to 40% of the maximum fEPSP-slope values.
The effective stimulation strength was adjusted to yield action potentials in about 50% of trials in the postsynaptically recorded CA1 pyramidal neuron.
More recently, Staud et al. [9] specifically assessed the temporal summation of second pain using heat stimulation and also found no brain activation differences when stimulus strength was adjusted to induce moderate pain in both groups.
Gradient strength was adjusted for b-value.
Stimulation strength was adjusted so that fEPSP amplitude is less than 50% saturation.
Stimulus strength was adjusted to a stimulation intensity that yielded a half-maximal response (50 150 μA).
Grip strength was adjusted by 10% for the non-dominant side (Bechtol 1954).
The ionic strength was adjusted to 0.001, 0.01, 0.1, and 0.5 mol L 1 by adding NaNO3.
