Convergence in Vocal Premotor Coding

发声前运动编码的收敛

• 批准号: 7157942
• 负责人: TODD F ROBERTS
• 金额: $ 5.04万
• 依托单位: DUKE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2008-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7157942
• 关键词: Aves; learning; neurons; songbirds; vocalization

DESCRIPTION (provided by applicant): It is not known if optimal coding strategies exist for learned motor behavior. Vocal learning is an excellent behavior in which this issue can be examined because all vocal learning species share similar constraints. This research will ask if parrots encode vocal representations in a manner similar to the vocal coding strategy previously described in songbirds. Birdsong is coded by a sparse-to-detailed temporal code between two premotor forebrain nuclei. This application asks if this coding strategy obtains in an analogous premotor circuit in the parrot forebrain. We will examine this issue using single cell chronic recordings during the production of learned vocalizations in an Australian parrot, the budgerigar. These studies will allow us to accurately assess the relation between motor output and premotor neural activity. If similar coding strategies are not evident among songbirds and parrots, it suggests that premotor representations for learned vocalizations are not highly constrained even among birds. Alternatively, if coding strategies are retained it will spur further investigation into other vocal learning species in order to establish a comparative data set for future cladistic analysis for coding strategies for learned vocalizations more generally.

描述（由申请人提供）：尚不清楚学习的运动行为是否存在最佳编码策略。声音学习是一种很好的行为，可以检查这个问题，因为所有声音学习物种都具有相似的约束。这项研究将询问鹦鹉是否以类似于先前在鸣禽中描述的声音编码策略的方式编码声音表征。鸟鸣声是由两个前运动前脑核之间从稀疏到详细的时间代码编码的。该应用询问这种编码策略是否适用于鹦鹉前脑中的类似前运动电路。我们将使用澳大利亚虎皮鹦鹉学习发声过程中的单细胞长期记录来研究这个问题。这些研究将使我们能够准确评估运动输出和运动前神经活动之间的关系。如果类似的编码策略在鸣禽和鹦鹉中不明显，则表明即使在鸟类中，习得发声的运动前表征也没有受到高度限制。或者，如果保留编码策略，它将刺激对其他发声学习物种的进一步研究，以便为未来更普遍地学习发声编码策略的分支分析建立比较数据集。