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Total numbers of On, Off, and Neutral cells recorded in the RVM of chronic morphine and placebo treated rats.
| On cells | Off cells | Neutral cells | Total cells | |
|---|---|---|---|---|
| Placebo | 55 | 21 | 92 | 168 |
| Morphine | 97 | 29 | 56 | 182 |
Chi-square analysis of the distribution revealed a statistically significant difference between the placebo and morphine treated animals (p < 0.001). N = 10 rats per treatment group.
