鸣禽鸣唱控制系统的前端脑通路(anterior forebrain pathway,AFP)在鸣唱学习中发挥着重要作用。新纹状体巨细胞核外侧部(lateral magnocellular nucleus of the anterior neostriatum,LMAN)是AFP的最后一级输出核团,AFP中的信号通过LMA...鸣禽鸣唱控制系统的前端脑通路(anterior forebrain pathway,AFP)在鸣唱学习中发挥着重要作用。新纹状体巨细胞核外侧部(lateral magnocellular nucleus of the anterior neostriatum,LMAN)是AFP的最后一级输出核团,AFP中的信号通过LMAN传导到弓状皮质栎核(robust nucleus of the arcopallium,RA),与高级发声中枢(high vocal centre,HVC)共同调节RA的活动,从而影响鸣禽的发声行为。LMAN可能通过其与RA的单突触连接来影响鸣唱可塑性。文章对近年来LMAN在鸣唱学习可塑性方面的研究进行综述。展开更多
The territorial song of Dendronanthus indicus in breeding season was analysed with computer acoustic analysis techniques. The bird’s song had only one sentence pattern, composed of the four phrases repeated “jue zhi...The territorial song of Dendronanthus indicus in breeding season was analysed with computer acoustic analysis techniques. The bird’s song had only one sentence pattern, composed of the four phrases repeated “jue zhi jù” syllables. Among these syllables, syllable of “jue” was the one with shortest duration (29.4±8.2ms), lowest frequency (MPF is 4120±156Hz) and broadest band-wide (BW -20dB =663±103 Hz). The “zhi” syllable had longest duration (260.4±20.4 ms), most narrow band-wide(BW -20dB =52±29Hz) and median frequency (MPF is 4841±39 Hz). The “jù” syllable had 121.4±15.7 ms duration and it’s energy was mainly concentrated in 6244±53 Hz and the BW -20dB was 118±52 Hz. The duration of the whole sentence was about 2231±22 ms and the range of freqency was between 3816±57 and 6599±104 Hz. The territorial area was about 7848 m 2 detected in the field using auditory feedback.展开更多
斑胸草雀是一种研究鸣禽发声学习的模式动物,其鸣唱核团体积具有明显的性别差异,主要与体内雄激素水平的差异有关.以成年雌性斑胸草雀为研究对象,通过埋植睾酮,人为提高雌鸟体内雄激素水平,利用冰冻切片技术,结合尼氏染色法观察埋植前后...斑胸草雀是一种研究鸣禽发声学习的模式动物,其鸣唱核团体积具有明显的性别差异,主要与体内雄激素水平的差异有关.以成年雌性斑胸草雀为研究对象,通过埋植睾酮,人为提高雌鸟体内雄激素水平,利用冰冻切片技术,结合尼氏染色法观察埋植前后HVC(high vocal center)、RA(robust nucleus of the arcopallium)核团体积的变化.实验分为雌鸟埋植组、正常雌鸟组与正常雄鸟组.实验结果表明:正常雄鸟的RA、HVC核团体积均显著大于正常雌鸟;雌鸟埋植睾酮后,RA核团体积显著增加,神经元数目未发生明显改变,HVC核团体积显著增加,神经元数目显著增加.综上,埋植睾酮后能使HVC、RA核团体积趋于雄性化.展开更多
文摘鸣禽鸣唱控制系统的前端脑通路(anterior forebrain pathway,AFP)在鸣唱学习中发挥着重要作用。新纹状体巨细胞核外侧部(lateral magnocellular nucleus of the anterior neostriatum,LMAN)是AFP的最后一级输出核团,AFP中的信号通过LMAN传导到弓状皮质栎核(robust nucleus of the arcopallium,RA),与高级发声中枢(high vocal centre,HVC)共同调节RA的活动,从而影响鸣禽的发声行为。LMAN可能通过其与RA的单突触连接来影响鸣唱可塑性。文章对近年来LMAN在鸣唱学习可塑性方面的研究进行综述。
文摘The territorial song of Dendronanthus indicus in breeding season was analysed with computer acoustic analysis techniques. The bird’s song had only one sentence pattern, composed of the four phrases repeated “jue zhi jù” syllables. Among these syllables, syllable of “jue” was the one with shortest duration (29.4±8.2ms), lowest frequency (MPF is 4120±156Hz) and broadest band-wide (BW -20dB =663±103 Hz). The “zhi” syllable had longest duration (260.4±20.4 ms), most narrow band-wide(BW -20dB =52±29Hz) and median frequency (MPF is 4841±39 Hz). The “jù” syllable had 121.4±15.7 ms duration and it’s energy was mainly concentrated in 6244±53 Hz and the BW -20dB was 118±52 Hz. The duration of the whole sentence was about 2231±22 ms and the range of freqency was between 3816±57 and 6599±104 Hz. The territorial area was about 7848 m 2 detected in the field using auditory feedback.
文摘斑胸草雀是一种研究鸣禽发声学习的模式动物,其鸣唱核团体积具有明显的性别差异,主要与体内雄激素水平的差异有关.以成年雌性斑胸草雀为研究对象,通过埋植睾酮,人为提高雌鸟体内雄激素水平,利用冰冻切片技术,结合尼氏染色法观察埋植前后HVC(high vocal center)、RA(robust nucleus of the arcopallium)核团体积的变化.实验分为雌鸟埋植组、正常雌鸟组与正常雄鸟组.实验结果表明:正常雄鸟的RA、HVC核团体积均显著大于正常雌鸟;雌鸟埋植睾酮后,RA核团体积显著增加,神经元数目未发生明显改变,HVC核团体积显著增加,神经元数目显著增加.综上,埋植睾酮后能使HVC、RA核团体积趋于雄性化.
