| Treatment | Dose (mg/kg) | Number of marble burying |
| Vehicle | - | 19.00 ± 1.00 |
| Diazepam | 1 | 7.40 ± 1.12* |
| MEBM | 50 | 15.00 ± 1.00* |
| MEBM | 100 | 11.80 ± 1.02* |
| MEBM | 200 | 8.40 ± 0.51* |