日本鹌鹑海马沿前后轴的功能分离。

Functional dissociation along the rostrocaudal axis of Japanese quail hippocampus.

机构信息

Dept. of Psychology, Wilfrid Laurier University, Waterloo, ON, Canada.

出版信息

PLoS One. 2022 Nov 14;17(11):e0277414. doi: 10.1371/journal.pone.0277414. eCollection 2022.

Abstract

The mammalian hippocampus (Hp) can be functionally segregated along its septotemporal axis, with involvement of dorsal hippocampus (dHp) in spatial memory and ventral hippocampus (vHp) in stress responses and emotional behaviour. In the present study, we investigate comparable functional segregation in proposed homologues within the avian brain. Using Japanese quail (Coturnix Japonica), we report that bilateral lesions of the rostral hippocampus (rHp) produce robust deficits in a spatial Y-maze discrimination (YMD) test while sparing performance during contextual fear conditioning (CFC), comparable to results from lesions to homologous regions in mammals. In contrast, caudal hippocampus (cHp) lesions failed to produce deficits in either CFC or YMD, suggesting that, unlike mammals, both cHp and rHp of birds can support emotional behavior. These observations demonstrate functional segregation along the rostrocaudal axis of the avian Hp that is comparable in part to distinctions seen along the mammalian hippocampal septotemporal axis.

摘要

哺乳动物的海马体(Hp)可以沿着其隔颞轴进行功能分区,其中背侧海马体(dHp)参与空间记忆,腹侧海马体(vHp)参与应激反应和情绪行为。在本研究中,我们调查了鸟类大脑中类似物的可比功能分区。使用日本鹌鹑(Coturnix Japonica),我们报告称,双侧前海马体(rHp)损伤会导致空间 Y 型迷宫辨别(YMD)测试中出现明显缺陷,而在情境性恐惧条件反射(CFC)中表现不受影响,这与哺乳动物中同源区域损伤的结果相似。相比之下,尾侧海马体(cHp)损伤既不会导致 CFC 也不会导致 YMD 缺陷,这表明,与哺乳动物不同,鸟类的 cHp 和 rHp 都能支持情绪行为。这些观察结果表明,鸟类的 Hp 沿着前后轴进行功能分区,在某种程度上与哺乳动物海马体的隔颞轴上的区别相似。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ea6d/9662724/ddda36c403c0/pone.0277414.g001.jpg

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