摘要
螽斯趋声行为的定量分析表明,螽斯具有良好的方向听觉能力。本文报道了螽斯前胸神经节内听觉上升神经元的结构、侧向性和方向灵敏度。在最佳频率15kHz时,它的侧向阈值差高达约16dB。它的方向灵敏度与声刺激频率密切有关,频率愈高,其方位阈值差愈大。上升神经元对每次刺激的峰脉冲发放数和潜伏期变化均与声音入射角有关,因此可用作声源的方向提示。
Quantitative analyses on phonotactic behavior of the bushcricket demonstrate that the bushcricket possesses good capability to determine direction of sound source. The morphological structure, laterality and directional sensitivity of the auditory ascending neuron in the prothoracic ganglion of the bushcricket have been studied. At its best frequency of 15 kHz, the laterality threshold difference of the neuron has a large value up to about 16 dB. Its directional sensitivity depends closely on stimulus frequency. The higher the stimulus frequency, the greater the directional threshold differences. Spike count and latency shift of the ascending neuron in response to each stimulus depend on the angle of incidence of sound. Therefore, the two parameters can be used as directional cues of sound source by the ascending neuron.
出处
《声学学报》
EI
CSCD
北大核心
1990年第6期463-468,共6页
Acta Acustica
基金
国家自然科学基金
