AUDITORY PATHWAYS IN THE BUDGERIGAR .1. THALAMO-TELENCEPHALIC PROJECTIONS
AUDITORY PATHWAYS IN THE BUDGERIGAR .1. THALAMO-TELENCEPHALIC PROJECTIONS
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DOI：
10.1159/000118645
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发表时间：
1987-05-01
影响因子：
1.7
通讯作者：
DOOLING, RJ
中科院分区：
文献类型：
--
作者：
BRAUTH, SE;MCHALE, CM;DOOLING, RJ
应用辣根过氧化物酶（HRP）组织化学和氨基酸放射自显影技术研究了虎皮鹦鹉（Melopsittacusundulatus）丘脑-端脑听觉通路。结果表明，该种动物丘脑听觉中继核、黑质核卵圆肌投射在尾侧和尾内侧新纹状体的限定区域上，包括区域“L "和中间新纹状体背外侧部（NIDL）的紧邻部分。NIDL的这个区域也接受来自另一个丘脑核的输入。背外侧后肌（DLP）。在虎皮鹦鹉中，DLP接收顶盖输入。氨基酸放射自显影证实了NIDL后DLP的预测。HRP实验结果表明，不同部位的n. ovoidalis投射在字段“L”和NIDL的不同部分上。神经元的背侧和外侧部分的N。卵圆肌投射到L区的更内侧部分。神经元位于中央的N。卵圆肌突出于视野“L”的中央和侧部。神经元在腹内侧部分的N。在HRP被放置在视野“L”中或直接邻近视野“L”的DLP投影视野中的所有情况下，卵圆肌都被标记。HRP注射液放置在NIDL中，位于n.卵圆肌和DLP标记其他间脑核团内的神经元，包括N.近圆形中间新纹状体的尾侧和中间水平显然是一个复杂的处理区，许多丘脑输入在这个物种。存在多个来自丘脑部分的丘脑-端脑上行投射，丘脑部分接收来自视觉（即，顶盖）和听觉（即，n.中脑外侧部（mesencephalicuslateralisparsdorsalis）中脑顶的部分（即，从DLP和从N。ovoidalis）提示在这些端脑区域可能发生联运联系。这种部分收敛的途径可能提供了一个基础的联运协会是重要的个人识别和社会信号系统在这个物种。
Thalamo-telencephalic auditory pathways in the budgerigar (Melopsittacus undulatus) were studied using horseradish peroxidase (HRP) histochemistry and amino acids autoradiography. The results indicate that in this species the thalamic auditory relay nucleus, n. ovoidalis, projects upon a circumscribed region of the caudal and caudo-medial neostriatum including field ''L'' and immediately adjacent portions of the neostriatum intermedium, pars dorsolateralis (NIDL). This region of NIDL also receives inputs from another thalamic nucleus, n. dorsolateralis posterior (DLP). In budgerigars, the DLP is in receipt of tectal inputs. Projections of DLP upon NIDL were confirmed with amino acids autoradiography. The results of the HRP experiments indicate that different portions of n. ovoidalis project upon different portions of field ''L'' and NIDL. Neurons in the dorsal and lateral portions of the n. ovoidalis project upon more medial portions of field ''L''. Neurons located centrally in the n. ovoidalis project upon central and lateral portion of field ''L''. Neurons in the ventromedial portion of the n. ovoidalis are labeled in all cases in which HRP is placed in either field ''L'' or in the DLP projection field immediately adjacent to field ''L'' proper. HRP injections placed in NIDL lateral to the projection fields of the n. ovoidalis and DLP label neurons within other diencephalic nuclei including the n. subrotundus. The caudal and intermediate levels of the neostriatum intermedium apparently serve as a complex processing area for many thalamic inputs in this species. The existence of multiple ascending thalamo-telencephalic projections from portions of the thalamus receiving inputs from both the visual (i.e., tectal) and auditory (i.e., n. mesencephalicus lateralis pars dorsalis) protions of the midbrain roof (i.e., from DLP and from n. ovoidalis) suggests the possibility that intermodal associations may take place in these telencephalic fields. Such partially converging pathways may provide a basics for intermodal associations which are important in individual recognition and social signalling systems in this species.