Lateralization of short- and long-term visual memories in an insect
Lateralization of short- and long-term visual memories in an insect
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DOI：
10.1098/rspb.2020.0677
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发表时间：
2020-05-13
影响因子：
4.7
通讯作者：
Niven, Jeremy E.
中科院分区：
文献类型：
--
作者：
Fernandes, A. Sofia David;Niven, Jeremy E.
脊椎动物大脑中记忆的形成是通过多种方式在两个半球之间进行侧化的。然而，在无脊椎动物中，偏侧化的证据仅限于嗅觉记忆，主要来自群居蜜蜂。在这里，我们使用经典的条件反射范式和视觉条件刺激来表明，视觉记忆在木蚁Formica rufa中是偏侧化的。我们表明，糖奖励与右或左触角(强化)之间的短暂接触足以产生偏侧化的记忆，即使在整个训练和测试过程中双眼都可以看到视觉提示。对右触角的强化会引发短期记忆，而对左触角的强化会引发长期记忆。因此，木蚁的短期和长期视觉记忆是偏侧化的。这扩展了昆虫记忆侧化的方式，并表明这种记忆侧化可能已经进化了多次，可能与膜翅目的共生进化有关。
The formation of memories within the vertebrate brain is lateralized between hemispheres across multiple modalities. However, in invertebrates evidence for lateralization is restricted to olfactory memories, primarily from social bees. Here, we use a classical conditioning paradigm with a visual conditioned stimulus to show that visual memories are lateralized in the wood ant, Formica rufa. We show that a brief contact between a sugar reward and either the right or left antenna (reinforcement) is sufficient to produce a lateralized memory, even though the visual cue is visible to both eyes throughout training and testing. Reinforcement given to the right antenna induced short-term memories, whereas reinforcement given to the left antenna induced long-term memories. Thus, short- and long-term visual memories are lateralized in wood ants. This extends the modalities across which memories are lateralized in insects and suggests that such memory lateralization may have evolved multiple times, possibly linked to the evolution of eusociality in the Hymenoptera.