翻开APP
首页 课程 直播 书院
|
声乐进修发源的肌动模子 - Erich Jarvis P2
存眷
相干课程
课程先容
本视频由科普中国和生物医学大课堂出品

Erich Jarvis (Duke/HHMI) Part 2: Motor theory of vocal learning origin

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.
批评
我要征询
讲师先容
  • 讲师:Erich Jarvis(神经生物学副传授)

    埃里希·贾维斯是美国杜克大学医学中间神经生物学副传授。他带领的团队的钻研职员钻研声响进修的神经生物学,它是白话的关头行动基板。他的钻研的植物模子包含燕雀,鹦鹉和蜂鸟。这些鸟类和人类一样,有才能进修新的声响和文明,一代又一代的通报它们的声响。