Quantitative assessment of song-selectivity in the zebra finch "high vocal center".
Quantitative assessment of song-selectivity in the zebra finch "high vocal center".
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斑胸草雀“高声中枢”歌曲选择性的定量评估。
DOI：
10.1007/bf00225832
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Volman,SF
中科院分区：
文献类型：
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作者：
Volman,SF
1.通过 3 种不同的方法在 54 个记录位点评估斑胸草雀 (Taenopygia guttata) 鸣叫系统核 HVc 的听觉反应：辨别动作电位；兴奋性综合反应；和兴奋性减抑制性反应总和。每个地点都呈现四种标准刺激：鸟自己的歌声；这首歌反转了；一首同名歌曲；和一阵噪音。通过计算划分响应的相对响应指数来量化响应，以提供跨刺激的响应概况。2.无论分析方法如何，最强的响应通常是对鸟自己的歌声（78-82％，取决于方法）。其余三种刺激的反应强度的主要顺序是同种歌曲>反向歌曲>噪音。3.相对反应幅度的分布对分析方法敏感。有区别的尖峰捕获了 HVc 神经元的异质性，而兴奋性总反应则更一致地反映了总体趋势。当从总反应中的兴奋中减去抑制时，相对反应的方差增加，但这种方法给统计分析带来了一些问题。4.使用其他前脑听觉区域神经元的小样本进行比较分析。在这些记录地点，鸟自己的歌声并没有始终如一地引起最佳反应，并且对四种刺激的相对反应通常存在较小的差异。这些细胞之间的刺激选择性程度较小，导致对评估方法差异的敏感性较低。
1.Auditory responses in the zebra finch (Taenopygia guttata) song-system nucleus HVc were assessed at 54 recording sites by 3 different methods: discriminated action potentials; excitatory summed responses; and excitatory minus inhibitory summed responses. Four standard stimuli were presented at each site: the bird's own song; this song reversed; a conspecific song; and a noise burst. Responses were quantified by calculating a relative response index that partitioned the response, to provide a response profile, across the stimuli.2.Regardless of analysis method, the strongest response was most often to the bird's own song (78–82%, depending on method). The predominant rank order of response strength across the remaining three stimuli was conspecific song > reversed song > noise.3.The distribution of relative response magnitude was sensitive to analysis method. Discriminated spikes captured the heterogeneity of HVc neurons, whereas the excitatory summed responses reflected the overall trends more consistently. When inhibition was subtracted from excitation in the summed responses, the variance of the relative responses increased, but this method presented some problems for statistical analysis.4.A small sample of neurons in other forebrain auditory areas was used for comparative analyses. At these recording sites, the bird's own song did not consistently elicit the best response and there were generally smaller differences in the relative responses to the four stimuli. The smaller degree of stimulus selectivity among these cells resulted in less sensitivity to differences in the assessment methods.