The origin of catecholaminergic inputs to the song control nucleus RA in canaries
The origin of catecholaminergic inputs to the song control nucleus RA in canaries
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DOI：
10.1097/00001756-200204160-00023
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发表时间：
2002-04-16
期刊：
影响因子：
1.7
通讯作者：
Balthazart, J
中科院分区：
文献类型：
--
作者：
Appeltants, D;Ball, GF;Balthazart, J
鱼中的鸣叫控制核接受密集的儿茶酚胺能输入，但对其解剖学起源知之甚少。我们通过逆行束示踪结合酪氨酸羟化酶的免疫细胞化学分析了金丝雀古纹状体核（RA）的儿茶酚胺能输入。在两性中，RA 的多巴胺能输入主要来自 Al I（中脑中央灰质）和 A10（Tsai 腹侧区）细胞群，但蓝斑和蓝下层 (A6) 也向 RA 发送去甲肾上腺素能投射。没有任何输入源自下丘脑和 A5 至 A1 儿茶酚胺能组。这些发现和之前对高音中枢 (HVc) 的研究表明，控制歌曲产生的运动通路的两个主要核（RA 和 HVc）接收相似来源的儿茶酚能输入。
Song control nuclei in oscines receive dense catecholaminergic inputs but their anatomical origin is poorly understood. We analyzed catecholaminergic inputs to the nucleus robustus archistriatalis (RA) in canaries by retrograde tract-tracing combined with immunocytochemistry for tyrosine hydroxylase. In both sexes, dopaminergic inputs to RA come mostly from the Al I (mesencephalic central gray) and A10 (area ventralis of Tsai) cell groups but the locus coeruleus and subcoeruleus (A6) also send noradrenergic projections to RA. No input originates in the hypothalamic and in the A5 to A1 catecholaminergic groups. These findings and previous work on the high vocal center (HVc) indicate that the two major nuclei of the motor pathway controlling song production (RA and HVc) receive catecholanninergic inputs of similar origins.