Ultrastructure of the anterior ventral and anterior medial nuclei of the cat thalamus
Ultrastructure of the anterior ventral and anterior medial nuclei of the cat thalamus
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猫丘脑前腹侧核和前内侧核的超微结构
DOI：
10.1007/bf00237299
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发表时间：
1978
影响因子：
2
通讯作者：
T. Tömböl
中科院分区：
文献类型：
--
作者：
G. Somogyi;F. Hajdu;T. Tömböl
摘要丘脑 AV-AM 核的电子显微镜研究证实了两种主要类型神经元的存在，即主（或中继）细胞和高尔基 II 型中间神经元。 AV-AM 中存在大量特征性突触岛。在这些岛屿中已鉴定出四种不同类型的突触末端： RL-boutons = 具有圆形突触囊泡的大轴突末端； RS-boutons = 带有圆形突触囊泡的小轴突末端； F1-boutons =包含扁平突触小泡的小轴突轮廓，F2-轮廓解释为突触前树突附属物，带有多形性小泡，两者都属于高尔基 II 型中间神经元。 — 研究了正常标本和乳头体、边缘皮层和海马损伤后的突触关系。源自内侧乳头核的特定传入神经（RL-boutons）是中继细胞树突和高尔基 II 型中间神经元的“突触前”树突轮廓的突触前，而高尔基体 II 型中间神经元的“突触前”树突轮廓又是相同中继树突（突触三联体）的突触前。 RS-boutons 主要起源于边缘皮层和海马体。
SummaryElectron microscopical studies of the thalamic AV-AM nuclei substantiated the presence of two main types of neurons, i.e. principal (or relay) cells and Golgi type II interneurons. Characteristic synaptic islands are found in abundance in the AV-AM. Four different types of synaptic terminals have been identified in these islands: RL-boutons = large axonal terminals with round synaptic vesicles; RS-boutons = small axonal terminals with round synaptic vesicles; F1-boutons = small axonal profiles containing flattened synaptic vesicles, and F2-profiles interpreted as presynaptic dendrite appendages, bearing pleomorphic vesicles, both belonging to the Golgi type II interneurons. — The synaptic relations were studied in normal preparations and after lesions in the mamillary body, limbic cortex and hippocampus. The specific afferents (RL-boutons) — originating from the medial mamillary nucleus — are presynaptic to both relay cell dendrites and “presynaptic” dendrite profiles of Golgi type II interneurons, which in turn are presynaptic to the same relay dendrites (synaptic triads). RS-boutons originate mainly from limbic cortex and hippocampus.