Maps of interaural delay in the owl's nucleus laminaris
Maps of interaural delay in the owl's nucleus laminaris
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DOI：
10.1152/jn.00644.2015
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发表时间：
2015-09-01
影响因子：
2.5
通讯作者：
Wagner, Hermann
中科院分区：
文献类型：
--
作者：
Carr, Catherine E.;Shah, Sahil;Wagner, Hermann
来自大细胞核的轴突在板状核（NL）中形成耳间时间差（ITD）的突触前图。这些输入产生随记录位置系统地变化的场电位，并且可以用于测量ITD的图。在谷仓猫头鹰，最好的ITD的表示转移与中侧位置在NL，从而形成连续的，平滑重叠的ITD地图与ISO-ITD轮廓不平行的NL边界。然而，正面空间（0度）在整个区域都有代表性，因此相对于周边来说代表性过高。突触前传导延迟的测量，结合延迟线传导速度的模型，揭示了传导延迟可以解释ITD地图中的中外侧移位。
Axons from the nucleus magnocellularis form a presynaptic map of interaural time differences (ITDs) in the nucleus laminaris (NL). These inputs generate a field potential that varies systematically with recording position and can be used to measure the map of ITDs. In the barn owl, the representation of best ITD shifts with mediolateral position in NL, so as to form continuous, smoothly overlapping maps of ITD with iso-ITD contours that are not parallel to the NL border. Frontal space (0 degrees) is, however, represented throughout and thus overrepresented with respect to the periphery. Measurements of presynaptic conduction delay, combined with a model of delay line conduction velocity, reveal that conduction delays can account for the mediolateral shifts in the map of ITD.