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控制声乐学习行为的大脑通路 - Erich Jarvis P1
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本视频由科普中国和生物医学大讲堂出品

Erich Jarvis (Duke/HHMI) Part 1: Convergent behavior and brain pathways

In Part 1, Jarvis explains that vocal learning is the ability to hear a sound and repeat it. Only 5 groups of mammals (including humans) and 3 groups of birds (parrots, hummingbirds and songbirds) are capable of vocal learning. Jarvis and his lab members imaged changes in gene expression in bird's brains after singing. They found that hummingbirds, songbirds and parrots each have pathways in specific areas of the brain that are not found in non-vocal learning birds. Interestingly, analogous networks exist in the human brain but not in non-vocal learning monkeys.

In Part 2, Jarvis proposes a mechanism by which vocal learning may have evolved. He suggests that the brain areas that control vocal learning are the result of a duplication of a pre-existing neural circuit that controls motor movement. A similar duplication event may have occurred during the evolution of humans with the result that both humans and Snowball, a cockatoo, can sing and dance to a beat!

In Jarvis' third talk, he demonstrates that the brain pathways necessary for vocal learning are associated with the expression of particular axonal guidance genes. He also proposes that the evolutionary events responsible for the development of vocal learning may be a general mechanism for the development of other complex behavioral traits.
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讲师介绍
  • 讲师:Erich Jarvis(神经生物学副教授)

    埃里希·贾维斯是美国杜克大学医学中心神经生物学副教授。他领导的团队的研究人员研究声音学习的神经生物学,它是口语的关键行为基板。他的研究的动物模型包括燕雀,鹦鹉和蜂鸟。这些鸟类和人类一样,有能力学习新的声音和文化,一代又一代的传递它们的声音。