کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4346543 | 1296793 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Coding sound direction in noisy environment in the superior colliculus of the rat Coding sound direction in noisy environment in the superior colliculus of the rat](/preview/png/4346543.png)
The aim of the present study was to evaluate the effect of background noise on the directional sensitivity of neurons in the deep layers of the superior colliculus. Extra-cellular recordings were carried out in anaesthetized adult Long Evans rats. When stimulated in a noisy environment, most of the neurons remained sensitive to sound direction and only a few changed their optimal direction by more than 15°. When stimulated at their optimal direction in the presence of background noise, a majority of neurons did not modify their response rate, whereas a limited proportion of neurons showed either a significant drop or facilitation of their response rate. Moreover, the neurons’ receptive fields showed significant tuning modifications in the presence of background noise. In a noisy environment, the larger receptive fields became narrower, whereas the sharply tuned receptive fields got broader.
Journal: Neuroscience Letters - Volume 470, Issue 1, 5 February 2010, Pages 28–32