TABLE 1.
| Memory task | Damage | RA Duration** (days) | Reference |
|---|---|---|---|
| Context fear | 25% dorsal | 1 (27) | Kim & Fanselow, 1992 |
| Context fear | 25% dorsal | 1 (49) | Anagnostaras et al., 1999 |
| Context fear | 40% dorsal | 28 (71)*** | Maren et al., 1997 |
| Context fear | 40% dorsal | flat (180) | Lehmann et al., 2007 |
| Context fear | 85% d + v | flat (180) | Lehmann et al., 2007 |
| Context fear | 40% dorsal | flat (84) | Sutherland et al., 2008 |
| Context fear | 40% ventral | flat (84) | Sutherland et al., 2008 |
| Context fear | 85% d + v | flat (84) | Sutherland et al., 2008 |
| Tone fear | 25% dorsal | none (28) | Kim & Fanselow, 1992 |
| Tone fear | 25% dorsal | none (50) | Anagnostaras et al., 1999 |
| Tone fear | 40% dorsal | flat (100) | Maren et al., 1997 |
| Tone fear | 40% dorsal | flat (84) | Sutherland et al., 2008 |
| Tone fear | 40% ventral | flat (84) | Sutherland et al., 2008 |
| Tone fear | 85% d + v | flat (84) | Sutherland et al., 2008 |
| Light fear | 85% d + v | flat (42) | Lehmann et al., 2009a |
| Spatial navigation | 80% d + v | flat (98) | Bolhuis et al., 1994 |
| Spatial navigation | 80% d + v | flat (90) | Mumby et al., 1999 |
| Spatial navigation | 75% d + v | flat (105) | Sutherland et al., 2001 |
| Spatial navigation**** | 85% d + v | flat (98) | Clark et al., 2005 |
| Spatial navigation | 95% d + v | flat (42) | Martin et al., 2005 |
| Spatial navigation**** | 40% dorsal | flat (98) | Clark et al., 2005 |
| Spatial navigation | 45% dorsal | flat (42) | Martin et al., 2005 |
| Spatial navigation | 45% ventral | flat (42) | Martin et al., 2005 |
| Object discrimination | 75% d + v | flat (105) | Sutherland et al., 2001 |
| Object discrimination | 80% d + v | none (83) | Mumby et al., 1999 |
| Object discrimination | 75% d + v | none (3) | Lehmann et al., 2007 |
| Object exploration | 75% d + v | flat (35) | Gaskin et al., 2003 |
| Shock-probe | 75% d + v | flat (14) | Lehmann et al., 2006 |
| Picture memory | 75% d + v | flat (90) | Epp et al., 2008 |
| Trace eyeblink | 45% dorsal | 1 (6) | Takehara, et al., 2003 |
| Trace fear | 45% dorsal | 1 (199) | Quinn, et al., 2008a |
| Flavour/odour | 25% d + v | 2 (3) | Winocur, 1990 |
| Flavour/odour | 80% d + v | 2 (3) | Winocur et al., 2001 |
| Flavour/odour | 85% d + v | 1 (9) | Clark et al., 2002 |
| Flavour/odour | 75% d + v | 1 (20) | Ross & Eichenbaum, 2006 |
| Flavour/odour | 90% d + v | 1 (1) | Tse et al., 2007 |
This table summarizes experiments on RA with rats that attempt to evaluate a temporal gradient using the first post-lesion memory retention test, as opposed to post-lesion relearning or retraining.
RA duration is the number of days between learning and surgery at which there is significant RA. In brackets is a measure of uncertainty in the duration of RA indexed by the difference in days between the interval at which there is significant RA and the first remote interval when retention is significantly better. Flat means that RA was equivalent at all learning-surgery intervals with the number in brackets being the longest interval tested. None means no detectable RA with the number in brackets being the longest interval tested.
Even with the most remote memory (100 days) RA was large and statistically significant.
Multiple spatial memory tasks were used in this paper.