Early Left-Planum Temporale Asymmetry in newborn monkeys (Papio anubis): A longitudinal structural MRI study at two stages of development.
Early Left-Planum Temporale Asymmetry in newborn monkeys (Papio anubis): A longitudinal structural MRI study at two stages of development.
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DOI：
10.1016/j.neuroimage.2020.117575
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发表时间：
2021-02-15
期刊：
影响因子：
5.7
通讯作者：
Meguerditchian A
中科院分区：
文献类型：
--
作者：
Becker Y;Sein J;Velly L;Giacomino L;Renaud L;Lacoste R;Anton JL;Nazarian B;Berne C;Meguerditchian A
新生的狒狒呈现向左的颞叶平面不对称。这一比例与人类新生儿和成年人相似。就像人类婴儿一样，这种不对称强度在发育过程中会增加。这些发现质疑早期的临时平面不对称作为人类特有的预连线语言准备大脑的标志。“语言准备”大脑理论认为，在接触语言之前，婴儿的大脑就已经具备了习得语言的能力。作为这种语言准备的潜在大脑标志，在人类婴儿的临时平面(PT)中发现了向左的结构不对称，该区域与WerNicke区重叠。在目前对35只新生猕猴(Papio Anubis)进行的纵向活体MRI研究中，我们发现了类似的左侧PT表面不对称。对7-10个月大的29只幼崽进行的跟踪扫描显示，这种不对称性在两个年龄段都有所增加。这些在非语言灵长类婴儿身上的原始发现强烈质疑了早期PT不对称构成人类婴儿特有的语言发展标志的观点。这种共享的早期周缘组织提供了额外的支持，即PT不对称可能与至少2500万-3500万年前我们与东半球猴子的最后共同祖先继承的偏侧化系统有关。
Newborn baboons present a leftward Planum Temporale Asymmetry. The proportion is similar to human newborns and adults. As in human infants, the asymmetry strength increases across development. These findings question early Planum Temporale Asymmetry as a human-specific marker for the prewired language-ready brain. The “language-ready” brain theory suggests that the infant brain is pre-wired for language acquisition prior to language exposure. As a potential brain marker of such a language readiness, a leftward structural brain asymmetry was found in human infants for the Planum Temporale (PT), which overlaps with Wernicke's area. In the present longitudinal in vivo MRI study conducted in 35 newborn monkeys (Papio anubis), we found a similar leftward PT surface asymmetry. Follow-up rescanning sessions on 29 juvenile baboons at 7-10 months showed that such an asymmetry increases across the two ages classes. These original findings in non-linguistic primate infants strongly question the idea that the early PT asymmetry constitutes a human infant-specific marker for language development. Such a shared early perisylvian organization provides additional support that PT asymmetry might be related to a lateralized system inherited from our last common ancestor with Old-World monkeys at least 25–35 million years ago.
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影响因子：
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作者：
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影响因子：
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DOI：
10.1098/rspb.2006.3580
发表时间：
2006-09-22
影响因子：
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作者：
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通讯作者：
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