| Time post op. | Animal nr | Graft, sub-epidural space | Subarachnoid space | ||
| Inflammation | Organization | Foreign body reaction | Inflammation | ||
| Wk 2 | 31 | +++ | ? | + | +++ |
| Wk 5 | 36 | ++ | + | ++ | ++ |
| Wk 8 | 40 | + | ++ | ++ | ++ |
| Wk 11 | 37 | + | +++ | + | + |