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. 2017 Dec 18;596(15):3327–3339. doi: 10.1113/JP274872

Figure 5. Maximal compound muscle action potential area, cervicomedullary motor evoked potential area and cortical voluntary activation across the fatiguing protocol.

Figure 5

Mean ± SEM values in normoxia (N,Inline graphic), acute hypoxia (AH, ■) and chronic hypoxia (CH,▼). Open symbols represent data points significantly lower than baseline values. Area of M max (A) and area of CMEP (B) normalized to the area of the M max evoked during the same contraction each minute, expressed as a percentage of the baseline value. C, absolute values of cortical voluntary activation measured at baseline (BL) and every 2 min during the fatiguing protocol. At the 10th, 11th, 13th and 15th min, CMEP area was lower in AH compared to CH (# P < 0.05). Cortical voluntary activation was lower at BL and the 8th and 16th min in AH compared to both N and CH († P < 0.05), and at the 14th min in AH relative to CH (# P < 0.05).