Neural correlates of a nonjammable electrolocation system.

Neural correlates of a nonjammable electrolocation system.
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不可干扰电定位系统的神经关联。

DOI:
10.1126/science.7455709
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发表时间:
1981
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Matsubara,JA
Matsubara,JA
中科院分区:
--
文献类型:
--
作者:
Matsubara,JA

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弱电鱼的电传感系统对物体的检测会受到电干扰,例如邻近电鱼发出的电器官放电产生的干扰。大多数电鱼都有一种行为反射,即干扰回避反应,可以保护它们的电定位系统免受干扰。胸骨鱼的独特之处在于它没有干扰回避反应,但即使在存在干扰的情况下也能进行电定位。看来,胸鳍龙不是通过行为策略来保护电定位,而是通过一阶中央处理机制来区分由物体引起的电器官放电幅度的局部变化和由干扰引起的大场幅度调制。这种机制充当局部对比度检测器,其功能类似于视网膜细胞用于响应光的局部对比度但不响应照明的整体变化的检测器。
The detection of objects by the electrosensory system of weakly electric fish is subject to electrical interference such as that produced by the electric organ discharges emitted by neighboring electric fish. Most electric fish species have a behavioral reflex, the jamming avoidance response, which protects their electrolocation system against jamming.Sternopygusis unique in that it has no jamming avoidance response, yet can electrolocate even in the presence of jamming. It appears thatSternopygusprotects electrolocation not by a behavioral strategy but by first-order central processing mechanisms that can distinguish between localized changes in the amplitudes of electric organ discharges caused by objects and large-field amplitude modulations caused by jamming. This mechanism acts as a local contrast detector and is functionally similar to the one used by retinal cells to respond to local contrast in light but not to overall changes in illumination.
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