Department of Psychology, University of Otago, Dunedin, New Zealand.
Hippocampus. 2021 Mar;31(3):261-280. doi: 10.1002/hipo.23287. Epub 2020 Dec 4.
We examined the role of the avian hippocampus and area parahippocampalis in serial-order behavior and a variety of other tasks known to be sensitive to hippocampal damage in mammals. Damage to the hippocampus and area parahippocampalis caused impairments in autoshaping and performance on an analogue of a radial-arm maze task, but had no effect on acquisition of 2-item, 3-item, and 4-item serial-order lists. Additionally, the lesions had no effect on the retention of 3-items lists, or on the ability to perform novel derived lists composed of elements from lists they had previously learned. The impairments in autoshaping and spatial behavior are consistent with the findings in mammals. The absence of impairments on the serial-order task may also be consistent once one considers that damage to the hippocampus in mammals seems to affect more internally-organized rather than externally-organized serial-order tasks. Together, the findings support the view that the avian hippocampal complex serves a function very similar to the mammalian hippocampus, a finding that is interesting given that the architecture of the avian hippocampus differs dramatically from that of the mammalian hippocampus.
我们研究了鸟类的海马体和副海马区在序列行为中的作用，以及其他各种已知对哺乳动物海马体损伤敏感的任务。海马体和副海马区的损伤导致了自动塑造和类似放射状迷宫任务的表现受损，但对 2 项、3 项和 4 项序列列表的习得没有影响。此外，这些损伤对 3 项列表的保留或对从以前学习的列表中组成元素的新衍生列表的执行能力没有影响。自动塑造和空间行为的损伤与哺乳动物的发现一致。如果考虑到哺乳动物的海马体损伤似乎更影响内部组织而不是外部组织的序列任务，那么在序列任务上没有损伤也可能是一致的。总的来说，这些发现支持了这样一种观点，即鸟类的海马体复合体具有与哺乳动物海马体非常相似的功能，这一发现很有趣，因为鸟类海马体的结构与哺乳动物海马体的结构有很大的不同。
