Coding of sound intensity in the chick cochlear nerve.
Coding of sound intensity in the chick cochlear nerve.
复制标题
雏鸡耳蜗神经中声音强度的编码。
作者：
J. Saunders;C. Ventetuolo;S. Plontke;B. Weiss
调谐曲线，自发活动，和率强度（RI）的功能，从鸡耳蜗神经的单位。从每个调谐曲线确定特征频率（CF）。每个RI函数的形状进行主观评价，并分配到四个RI类型之一。对每个功能的断点、最高SPL时的放电率以及主要和次要节段的斜率进行定量。CF和RI类型与这些变量相关。一个新的RI功能中观察到的放电活动在第二段减少刺激水平增加以上的断点。这种功能被称为“向下倾斜”类型。在959个单位，饱和，斜上，斜下，和直RI类型分别在39.2%，35.5%，12.6%和12.7%的样本中确定。四种类型的主动脉段斜率基本相同，平均为5.48 S。s（-1）。dB（-1）在所有单位。当根据主观分配按RI类型分离时，二级节段的斜率形成四个分组，平均值为0.03、1.22、-0.90和3.95 S。s（-1）。dB（-1），分别为饱和型、上斜型、下斜型和直线型。描述所有单位二级节段的数据均采用多房室多项式拟合，并显示出连续分布，该分布在不同RI类别中存在一定重叠。RI类型的比例，以及次级和初级斜率在CF中大致恒定。此外，似乎定义这四种类型的其他参数在大多数情况下均匀分布在鸡内耳的频率轴上。最后，具有共同的CF的RI函数的比较表明，确定RI类型的压缩非线性可能是一种现象，定位于个别的毛细胞在鸟耳。
Tuning curves, spontaneous activity, and rate-intensity (RI) functions were obtained from units in the chick cochlear nerve. The characteristic frequency (CF) was determined from each tuning curve. The shape of each RI function was subjectively evaluated and assigned to one of four RI types. The breakpoint, discharge rate at the highest SPLs, and slopes of the primary and secondary segments were quantified for each function. The CF and RI type were then related to these variables. A new RI function was observed in which the discharge activity in the secondary segment diminished as stimulus level increased above the breakpoint. This function was called a "sloping-down" type. In 959 units, saturating, sloping-up, sloping-down, and straight RI types were identified in 39.2, 35.5, 12.6, and 12.7% of the sample, respectively. The slope of the primary segment was nearly the same in each of the four types and averaged 5.48 S. s(-1). dB(-1) across all units. The slopes of the secondary segments formed four groupings when segregated by RI type based on the subjective assignments and averaged 0.03, 1.22, -0.90, and 3.95 S. s(-1). dB(-1) in the saturating, sloping-up, sloping-down, and straight types, respectively. The data describing the secondary segments of all units were fit with a multi-compartment polynomial and showed a continuous distribution that segregated, with some overlap, into the different RI categories. The proportion of RI types, as well as the secondary and primary slopes were approximately constant across CFs. In addition, it would appear that the other parameters that define the four types were, for the most part, homogeneously distributed across the frequency axis of the chick inner ear. Finally, a comparison of RI functions having a common CF suggested that the compressive nonlinearity that determines RI type may be a phenomenon localized to individual hair cells in the bird ear.
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影响因子：
56.9
作者：
LIBERMAN, MC
通讯作者：
LIBERMAN, MC
新生雏鸡暴露于强烈声音后的耳蜗神经活动。
DOI：
10.1152/jn.1996.76.2.770
发表时间：
1996
期刊：
Journal of neurophysiology.
影响因子：
--
作者：
Saunders,JC;Doan,DE;Poje,CP;Fisher,KA
通讯作者：
Fisher,KA
鳄鱼蜥蜴耳蜗神经纤维中放电速率对声压水平的依赖性：对耳蜗机制的影响。
影响因子：
2.5
作者：
Eatock,RA;Weiss,TF;Otto,KL
通讯作者：
Otto,KL
白来亨鸡（Gallus Domesticus）的 2f1-f2 畸变产物耳声发射：频率比和相对水平的影响。
影响因子：
1.6
作者：
Burkard,R;Salvi,R;Chen,L
通讯作者：
Chen,L
DOI：
10.1073/pnas.210389497
发表时间：
2000-10-24
影响因子：
11.1
作者：
Martin, P;Mehta, AD;Hudspeth, AJ
通讯作者：
Hudspeth, AJ