Figure 3.

Effect of anesthesia on evoked responses. The mean local field potential, single unit, multi-unit activity, and blood oxygenation level-dependent responses during anesthesia are shown for each drug condition. Values are normalized to the level before anesthesia (100%) for each case. The significant differences in single unit, multi-unit activity, and blood oxygenation level-dependent responses between fentanyl (FEN) and isoflurane (ISO) are indicated with brackets. Note that mean multi-unit activity, single unit, and blood oxygenation level-dependent response show significant differences across drug conditions, whereas local field potential remains relatively unchanged.