ORGANIZATION AND DEVELOPMENT OF BRAIN-STEM AUDITORY NUCLEI OF CHICKEN - TONOTOPIC ORGANIZATION OF N-MAGNOCELLULARIS AND N-LAMINARIS
ORGANIZATION AND DEVELOPMENT OF BRAIN-STEM AUDITORY NUCLEI OF CHICKEN - TONOTOPIC ORGANIZATION OF N-MAGNOCELLULARIS AND N-LAMINARIS
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DOI：
10.1002/cne.901640403
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发表时间：
1975-01-01
影响因子：
2.5
通讯作者：
PARKS, TN
中科院分区：
文献类型：
--
作者：
RUBEL, EW;PARKS, TN
短纯音刺激的细胞外反应记录用于确定n的音调组织。magnocellularis（NM）和n. laminaris（NL）在雏鸡中的作用。NM细胞对同侧刺激表现出“初级样”反应模式，并排列在背腹侧等长柱中。对最高频率音调（约4，100 Hz）作出反应的单位位于内侧部的吻内侧极。低特征频率（CF's）的单位依次出现在尾侧和外侧部位，直到极低的CF's（<500 Hz）出现在外侧区尾侧尾的背腹侧。没有证据表明，听觉输入到该地区接受预测从黄斑lagena。NL接收极化的双耳兴奋性输入。单位有类似的CF的和阈值的音调提出任何一只耳朵。NL中的音调组织与NM中发现的音调组织相匹配-高CF的吻内侧和低CF的尾侧和外侧。定量程序的开发有关CF的一个单元内的任何一个核的位置。这些分析分别占NM和NL内发现的频率方差的79%和89%，并通过其在每个核内的位置预测神经元的CF。
Extracellular recordings of responses to tone‐burst stimulation were used to determine the tonotopic organization of n. magnocellularis (NM) and n. laminaris (NL) in hatchling chickens. NM cells show “primary‐like” response patterns to ipsilateral stimulation, and are arranged in dorso‐ventral isofrequency columns. Units responding to the highest frequency tones (about 4,100 Hz) are situated at the rostromedial pole of the medial division. Units with lower characteristic frequencies (CF's) are found at successively caudal and lateral sites, until extremely low CF's (<500 Hz) are represented dorsoventrally in the caudolateral tail of the lateral division. No evidence was found of auditory input to the region which receives projections from the macula lagena. NL receives polarized, binaural, excitatory input. Units have similar CF's and thresholds to tones presented to either ear. The tonotopic organization in NL matches that found in NM — high CF's rostromedially and low CF's caudal and lateral. Quantitative procedures were developed for relating CF to the position of a unit within either nucleus. These analyses account for 79% and 89% of the frequency variance found within NM and NL, respectively, and predict the CF of a neuron by its position within each nucleus.