Gagliardo A, Mazzotto M, Bingman V P
Dipartimento di Scienze del Comportamento Animale e dell'Uomo, Pisa, Italy.
Behav Brain Res. 1997 Jul;86(2):143-8. doi: 10.1016/s0166-4328(96)02253-x.
Young homing pigeons were subjected to ablations of the piriform cortex or left intact and allowed to learn a navigational map. Three months later, control and piriform cortex lesioned pigeons were released from three unfamiliar locations. Control pigeons oriented homeward indicating successful navigational map learning. In contrast, piriform cortex ablated pigeons consistently oriented east, took more time to return home and were more likely to get lost. The results demonstrate that piriform cortex ablations in young homing pigeons disrupt navigational learning. The data support the conclusion that participation of the piriform cortex is necessary for navigational map learning, and its role in navigational learning cannot be substituted for by other telencephalic olfactory processing regions. Further, the results show that the role of olfactory cues in building up the navigational map cannot be replaced by other non olfactory environmental stimuli.
对幼年归巢鸽进行梨状皮质切除或保持完整，并让它们学习导航地图。三个月后，将对照组和梨状皮质受损的鸽子从三个不熟悉的地点放飞。对照组鸽子能朝着家的方向定向，表明导航地图学习成功。相比之下，梨状皮质切除的鸽子始终向东定向，回家花费的时间更长，且更容易迷路。结果表明，幼年归巢鸽的梨状皮质切除会干扰导航学习。这些数据支持了这样的结论，即梨状皮质的参与对于导航地图学习是必要的，并且其在导航学习中的作用不能被其他端脑嗅觉处理区域所替代。此外,结果表明嗅觉线索在构建导航地图中的作用不能被其他非嗅觉环境刺激所取代。
