The Barnes maze, a spatial memory recognition test, did not show significant differences between the controls and the anesthesia exposure groups. (A) The time to escape, shown by trail, showed a similar learning pattern for all three groups. (B) During the probe trial, where the escape was removed, the group occupancy plot shows a slightly higher intensity near the escape point during probe trials for the unexposed, but this was not significant. There was a trend for unexposed animals to spend more time around the target quadrant in the first minute; again, this was not significant and did not extend to entire duration of the probe trial. OQ = opposite quadrant; TQ = target quadrant.