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Table 1 Comparison of MEP parameters obtained with cross scalp and midline stimulating positions

From: Clinical and physiological effects of transcranial electrical stimulation position on motor evoked potentials in scoliosis surgery

Parameter Latency (ms) Amplitude (mV) Intensity (mA)
First MEP    
Cross scalp 27.9 (2.7) 71.3 (37.3) 52.9 (15.5)
Midline 29.2 (3.7) 43.5 (38.1) 76.4 (18.3)
Maximum MEP    
Cross scalp 27.7 (2.8) 130.5 (45.1) 61.8 (13.7)
Midline 29.1 (3.8) 57.9 (46.5) 80.5 (15.4)
  1. Each value indicates mean and (standard deviation)