Table 2.

Short-interval intracortical inhibition (SICI): stimulation parameters

Parameter	Prone	Supine
Unadjusted
TS	45.0 ± 7.0 (120 ± 7 AMT)	44.4 ± 4.7 (118.2 ± 6 AMT)
CS	26.4 ± 4.1 (71 ± 7 AMT)	27.0 ± 3.7 (72.9 ± 6 AMT)

	Prone
	Baseline	ABD	ADD
Adjusted
TS	44.0 ± 3.7	46.7 ± 4.0	48.1 ± 5.0 (F = 19.5, P < 0.001)
Test MEP	2.3 ± 0.4 mV	2.4 ± 0.4 mV	2.3 ± 0.5 mV (F = 1.7, P = 0.6)

Mean stimulus intensity (±SD) used for the test stimulus (TS) and conditioning stimulus (CS) during SICI testing when measurements were completed without adjusting (Unadjusted) or adjusting (Adjusted) the size of the Test MEP. In the unadjusted condition, the same stimulus intensity was used across conditions, with the right hand tested in both prone and supine postures. In the adjusted condition, the intensity of the TS was changed to acquire a Test MEP of around 2 mV, with the right hand in prone posture. Note there were no differences in the size of the Test MEP when SICI was tested across conditions (Baseline = right index finger remained at rest; ABD = 30% of right index finger abduction; and ADD = 30% of right index finger adduction).