
1. Compare before the stimulus to right after.
10 seconds prior and 10 seconds after.
30 frames per second.
300 frames before and after.

Is the 10 seconds after significantly different from before.
Permutation tests.
Low p-value <= 0.01.

2. What percentage of cells respond to the odor vs. the air puff.

3. Between the different neurons, which respond to multiple stimuli.

4. Correlation for modalities.
Line up the peak values. 

Onset -- from 5% to 95% of the peak.

5. For each stimulus what is the order of neuron firing.
Show this with overlaps.

delta over f: (f - f_background)/f_background
