Papi F, Casini G
Dipartimento di Scienze del Comportamento Animale e dell'Uomo dell'Università, Pisa, Italy.
Proc Natl Acad Sci U S A. 1990 May;87(10):3783-7. doi: 10.1073/pnas.87.10.3783.
Homing behavior was tested in pigeons (Columba livia) after removing a portion of the ventrolateral telencephalon, which receives extensive projections from the olfactory bulb and is comparable with the mammalian pyriform cortex. Ablated pigeons show unaffected cardiac responses to odorous stimuli but altered homing behavior. After the operation, the birds were trained by repeated flock releases along with control birds from a site 40 km from the loft. After being released singly from this familiar site, the ablated birds turned out to be unaffected by the operation. In releases from two unfamiliar sites, ablated birds, unlike control birds, were not homeward oriented and were mostly lost. The ablation of the pyriform cortex has the same effect on homing behavior as olfactory deprivation. It can be concluded that the pyriform cortex plays an important role in the specific mechanisms linking olfactory inputs with the navigational response.
在切除一部分腹外侧端脑（该区域接受来自嗅球的大量投射，相当于哺乳动物的梨状皮质）后，对鸽子（家鸽）的归巢行为进行了测试。被切除的鸽子对气味刺激的心脏反应未受影响，但归巢行为发生了改变。手术后，这些鸟与来自距离鸽舍40公里处的对照鸟一起通过反复成群放飞进行训练。从这个熟悉的地点单独放飞后，被切除的鸟结果显示未受手术影响。在从两个不熟悉的地点放飞时，与对照鸟不同，被切除的鸟没有朝着家的方向飞行，大多迷失了方向。梨状皮质的切除对归巢行为的影响与嗅觉剥夺相同。可以得出结论，梨状皮质在将嗅觉输入与导航反应联系起来的特定机制中起重要作用。
