Do food-caching chickadees grow their hippocampus every autumn when they need to cache food and then shrink it for the rest of the year?

Do food-caching chickadees grow their hippocampus every autumn when they need to cache food and then shrink it for the rest of the year?
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每年秋天,当山雀需要储存食物时,它们的海马体都会生长,然后在一年中的剩余时间里缩小它的海马体吗?

DOI:
10.1016/j.anbehav.2022.06.006
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发表时间:
2022
期刊:
影响因子:
2.5
通讯作者:
Pravosudov, Vladimir V.
Pravosudov, Vladimir V.
中科院分区:
生物学2区
文献类型:
--
作者:
Pravosudov, Vladimir V.

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了解大脑可塑性与环境变化的关系是行为神经科学和神经生态学的重大问题之一。这是常见的,特别是在流行的文献报道,食物缓存鸟类,如山雀扩大其海马体积,这是涉及空间学习和记忆,通过在它们强烈储存食物的时间(秋季)增加更多的神经元,然后在一年中的其余时间(夏季)它们不储存食物或储存得更少时减少海马体的大小和海马体神经元的数量,(冬、春)。如果这是真的,这将是一种高度适应性的机制,允许食物缓存鸟类改变其记忆容量与食物缓存记忆的季节性变化有关。不幸的是,这种说法是如此持久,当确凿的证据并不那么简单时,虽然有一些数据表明,食物缓存的黑顶山雀,Poecile atricapillus,和杨柳山雀,Poecile montanus,与在其它时期牺牲的其它个体相比,在峰值缓存的一个月期间取样的个体确实具有更大的海马体和更多的海马体神经元(Lange等人,2022; Smulders,Casto等人,2000; Smulders等人,1995; Smulders,Shiflett等人,2000),有一个庞大的机构
Understanding brain plasticity as it relates to environmental variation is one of the big issues in behavioural neuroscience and neuroecology. It is common, especially in popular literature to report that food-caching birds such as chickadees expand their hippocampus volume, which is involved in spatial learning and memory, by adding more neurons during the time when they are intensely caching food (autumn) and then reduce the hippocampus size and the number of hippocampal neurons during the rest of the year when they either do not cache food (summer) or cache much less (winter, spring). If true, this would be a highly adaptive mechanism allowing food-caching birds to change their memory capacity associated with seasonal variation in memories of food caches.It is unfortunate that this claim is so persistent when the hard evidence is not that simple e while there are some data showing that food-caching black-capped chickadees, Poecile atricapillus, and willow tits, Poecile montanus, sampled during the month of peak caching indeed had larger hippocampus and more hippocampal neurons compared to other individuals sacrificed during other periods (Lange et al., 2022; Smulders, Casto et al., 2000; Smulders et al., 1995; Smulders, Shiflett et al., 2000), there is a large body
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