Desflurane at 0.5 and 0.7 MAC depresses LL MEP to 58.4 % and 59.9 % of baseline , respectively ( P < 0.05 ) , whereas sevoflurane at 0.3 , 0.5 , and 0.7 MAC depresses LL MEP to 66.2 % , 41.3 % , and 25.3 % of baseline , respectively ( P < 0.05 ) .