Bingman V P, Ioalè P, Casini G, Bagnoli P
Brain Behav Evol. 1985;26(1):1-9. doi: 10.1159/000118763.
In a series of experiments which involved only short distance experimental releases (800 m or less and within view of the home loft), it was demonstrated that dorsomedial forebrain ablated pigeons generally failed to reassociate with their home loft if the postablation experimental release took place soon postablation or if during the time between ablation and experimental release they were kept away from their home loft. In contrast, if dorsomedial forebrain ablated pigeons were allowed to recover at their home loft prior to experimental release, they succeeded in associating with their home loft in a manner similar to controls. However, only postablation exposure to a pigeon's own loft was sufficient to permit continued home loft association. Pigeons from one loft failed to associate with a foreign postablation recovery loft when released within sight of it. The results show that dorsomedial forebrain ablations result in pigeons which no longer succeed in associating with their home loft; recovery from failed home loft association behavior is possible with postablation exposure to the home loft, and a pigeon's previous association with a loft was a precondition if postablation association was to be affected. The results suggest that dorsomedial forebrain ablated pigeons retain something like a 'home loft trace' which they can use to mediate retrieval and reformation of the recognition properties needed for proper home loft association.
在一系列仅涉及短距离实验放飞（800米或更短且在鸽舍视野范围内）的实验中，结果表明，如果在切除背内侧前脑后不久就进行实验放飞，或者在切除与实验放飞之间的时间段内将鸽子与鸽舍隔开，那么切除背内侧前脑的鸽子通常无法重新与它们的鸽舍建立联系。相比之下，如果在实验放飞前允许切除背内侧前脑的鸽子在其鸽舍恢复，它们能够以与对照组相似的方式成功与鸽舍建立联系。然而，仅在切除后接触鸽子自己的鸽舍就足以使其继续与鸽舍保持联系。当来自一个鸽舍的鸽子在能看到的情况下被放飞到一个陌生的切除后恢复鸽舍时，它们无法与该鸽舍建立联系。结果表明，背内侧前脑切除会导致鸽子不再能够成功与它们的鸽舍建立联系；切除后接触鸽舍可以使失败的鸽舍联系行为恢复，并且如果要影响切除后的联系，鸽子之前与鸽舍的联系是一个先决条件。结果表明，切除背内侧前脑的鸽子保留了某种类似“鸽舍痕迹”的东西，它们可以利用这种痕迹来介导对正确鸽舍联系所需识别特性的检索和重塑。
