Effect of mechanosensory stimulation on mean reversal interval
| Mean reversal interval (seconds) | |||||
|---|---|---|---|---|---|
| Stimulus applied | First | Second | Third | Fourth | Significance (p value) second versus third |
| Gentle touch (tail) | |||||
| N2 | 26±2.7 (50) | 14±2.2 (50) | 21±3.2 (50) | 13±2.8 (50) | 0.02 |
| mec-3 | 22±2.4 (30) | 12±1.6 (30) | 10±1.3 (30) | 10±0.8 (30) | 0.32 |
| Harsh touch | |||||
| N2 | 45±2.0 (50) | 11±1.4 (50) | 42±3.8 (50) | 10±0.9 (50) | 0.01 |
| mec-3 | 30±3.3 (50) | 11±1.7 (50) | 14±1.9 (50) | 12±1.4 (50) | 0.25 |
| Heat stimulus | 63±4.5 (60) | 21±3.0 (60) | 19±2.9 (60) | 15±2.1 (60) | 0.79 |
The data consist of the mean reversal intervals in seconds ± SEM for the first, second, third, and fourth intervals. The numbers of worms assayed are in parentheses. In all cases the stimulus was applied after completion of the second reversal.
The second and third reversal intervals were compared using the Mann-Whitney U statistic.