杏仁核内去甲肾上腺素能神经纤维的传入联系

本实验用神经元逆行荧光标记和单胺荧光组化联合法研究了大白鼠杏仁核(AC)内去甲肾上腺素能(NA)神经纤维的细胞起源及投射特点。一侧AC内注射荧光标记物后,两侧蓝斑(A_6群)中段背份和头段、延體腹外侧网状结构(A_1群)和孤束核(A_2群)出现NA逆行荧光标记细胞,都以同侧为主。A_1和A_2群内的逆行标记细胞主要见于两细胞群的中下份。A_1,2,6群内尚存在少数非NA逆行标记细胞。AC与同侧尾壳核、伏隔核与额前皮质配对注入不同标记物后,同侧蓝斑内观察到双标记的NA神经细胞。双侧AC分别注入不同标记物后,两侧蓝斑均有双标记NA细胞出现。

THE ORIGIN OF NORADRENERGIC FIBRES IN THE AMYGDALA

The origin of the noradrenergic fibres in the amygdala was explored in rats by a combination of fluorescent retrograde neuronal tracing and monoamine histofluorescence techniques. Affer separately injecting different fluorescent tracers into the amygdala, some of the noradrenergic cells in the cranial potion and in the dorsum of the middle portion of the locus coeruleus and the caudal portion of the group A_1 and A_2 were labeled, mainly ipsilaterally. By combining injections of NY-EB or Bb-EB into ipsilateral and caudate putamen, prefrontal cortex or accumbens nucleus, or bilateral amygdala, some double labeled noradrenergic cells were seen in the locus coeruleus. Moreover, a few non-noradrenergic retrogradely labeled cells were observed in the lgroups A_6, A_1 and A_2 after injecting tracers into amygdala.