高度杂波空间中 CF-FM 蝙蝠下丘回声定位的神经机制

摘要

Bats are specialists for echolocation .The CF-FM bat faces a problem on how to distinguish and determine the echo carrying information about target among emitted call and multiple reflections in a highly cluttered situation .Previous studies suggested that the CF-FM bat which emitted complex CF-FM pulses could encode the distance and relative speed of target included in pulse -echo pair in cluttered space by temporal and spectral integration of signal in the auditory center .These neural mechanisms of encoding in inferior colliculus were reviewed to further recognization the principle of auditory center processing echolocation signal in complicated auditory habitat .%蝙蝠是回声定位的专家。对于在高度杂波空间中捕食的CF-FM蝙蝠，面临着如何从发声和众多由背景环境物体反射的杂波回声中分辨和判断来自靶物的回声所携带信息的问题。已有研究表明，CF-FM蝙蝠可通过发出复杂成分的声脉冲，并通过听中枢的时相和频率整合来处理杂波环境下发声－回声对中包含的靶物距离和相对移动速度的信息。就以上方面在听中脑下丘的神经机制进行概述，以促进人们对听中枢在复杂听环境下对回声定位信号加工原理的认识。