Figure 2

Respiratory pattern during exposure to 5% CO₂ at P6. Upper traces: respiratory pattern in a WT mouse (inspiration is upwards) during control and at 2 and 5 min of exposure to CO₂. Lower traces: pattern in a GAD65-/- mouse at same times. The larger variability in breath-to breath amplitude seen in the 5^th min in WT was observed in 8 of 13 WT animals at P6. It was not seen in GAD65-/- mice.