The motor threshold was measured twice, at baseline, and just before the last measurement.
The motor threshold (MT) was measured as the minimum stimulus intensity that elicited a motor evoked potential (MEP) of at least 50 μV in 5 or more of 10 consecutive stimulations in the right APB hot spot.
Motor threshold (MT) was measured at the hotspot of the right APB muscle as the minimum stimulus intensity able to elicit a motor evoked potential (MEP) of at least 50 μV in 5 or more of 10 consecutive stimulations.
Indeed, motor threshold as a measure of motor cortex excitability has been found to be correlated with phosphene threshold, a measure of visual cortex excitability.
Although a one-side reduction of the H-reflex amplitude can be noted in Figure 3A and 3B, there was no significant difference (t = 1.15, p = 0.25) in the mean H-reflex amplitude measured at motor threshold between controls and Group 1 patients (see also Table 1).
Motor threshold and MEP measurements will be performed [ 72] using single-pulse TMS.
We measured motor thresholds (MTs) to TMS, short-interval intracortical inhibition, and ratios between motor-evoked potential amplitudes and supramaximal M responses in MP and CS on two different days, before and after LD or EL.
Resting motor threshold (RMT), cortical silent period (CSP) and paired-pulse TMS (ppTMS) were measured on four different days in 16 migraineurs.
In each subject, the motor threshold was preliminarily determined as the best cortical point activating the FDI muscle, as determined by EMG, measured as the stimulus intensity triggering at least a 50 µV response in 50% of 10 consecutive stimulations.
Height = cm; latency = ms; interside 1 = left (L) right (R) latency difference; threshold = multiples of motor threshold (x MTh); interside 2 = L/R threshold difference; Size* = % of maximal motor response (Mmax) measured at 1 x MTh; interside 3 = L/R size* difference; size** = % of Mmax measured at 1.5 x MTh; interside 4 = L/R size** difference.
