Chung Wen-Sung, López-Galán Alejandra, Kurniawan Nyoman D, Marshall N Justin
Queensland Brain Institute, The University of Queensland, St Lucia, QLD 4072, Australia.
Centre for Advanced Imaging, The University of Queensland, St Lucia, QLD 4072, Australia.
iScience. 2022 Dec 21;26(1):105846. doi: 10.1016/j.isci.2022.105846. eCollection 2023 Jan 20.
Cuttlefish are known for their rapid changes of appearance enabling camouflage and con-specific communication for mating or agonistic display. However, interpretation of their sophisticated behaviors and responsible brain areas is based on the better-studied squid brain atlas. Here we present the first detailed description of the neuroanatomical features of a tropical and diurnal cuttlefish, , coupled with observations on ontogenetic changes in its visual and learning centers using a suite of MRI-based techniques and histology. We then make comparisons to a loliginid squid, treating it as a 'baseline', and also to other cuttlefish species to help construct a connectivity map of the cuttlefish brain. Differences in brain anatomy and the previously unknown neural connections associated with camouflage, motor control and chemosensory function are described. These findings link brain heterogeneity to ecological niches and lifestyle, feeding hypotheses and evolutionary history, and provide a timely, new technology update to older literature.
乌贼以其能迅速改变外观而闻名，这使其能够进行伪装以及在求偶或争斗展示时与同种个体进行交流。然而，对其复杂行为和相关脑区的解读是基于研究更为充分的鱿鱼脑图谱。在此，我们首次详细描述了一种热带昼行性乌贼的神经解剖学特征，并利用一系列基于磁共振成像的技术和组织学方法，对其视觉和学习中心的个体发育变化进行了观察。然后，我们将其与一种枪乌贼（将其视为“基线”）以及其他乌贼物种进行比较，以帮助构建乌贼脑的连接图谱。文中描述了脑解剖结构的差异以及与伪装、运动控制和化学感应功能相关的此前未知的神经连接。这些发现将脑的异质性与生态位和生活方式、摄食假说以及进化历史联系起来，并为旧有文献提供了及时的新技术更新。
