SYNAPTIC ORGANIZATION OF CORTICAL PROJECTION TO PULVINAR OF SQUIRREL-MONKEY
SYNAPTIC ORGANIZATION OF CORTICAL PROJECTION TO PULVINAR OF SQUIRREL-MONKEY
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DOI：
10.1002/cne.901460104
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发表时间：
1972-01-01
影响因子：
2.5
通讯作者：
MATHERS, LH
中科院分区：
文献类型：
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作者：
MATHERS, LH
突触形态的枕已被检查以下皮层病变的周纹，后颞叶和后顶叶地区。光镜染色显示外侧肌、下肌和后核的顺行性变性，下肌内侧半和后核的输入会聚。电子显微镜检查显示，由于皮质损伤，两种不同群体的突触终末部分退化：RS末端，其迅速变得电子致密，随后被吞噬，和RL末端，最初表现出神经丝增生的迹象，后来变成电子致密。比较枕和其他丘脑核之间的突触组织和起源，外源性突触终末。有人指出，虽然在枕内的整体安排是相当于VB，MGB或dLGN，事实上，两个不同的群体的突触末梢起源于皮质表明枕和其他部分的丘脑检查到目前为止的功能差异。讨论了枕的不同部位的可能的系统发育起源。
The synaptic morphology of the pulvinar has been examined following cortical lesions in peristriate, posterior temporal and posterior parietal areas. Light‐microscopic stains demonstrate orthograde degeneration in p. lateralis, p. inferior, and the posterior nucleus, with a convergent input to the medial one‐half of p. inferior and the posterior nucleus. Electron microscopic examination shows that parts of two different populations of synaptic terminals degenerate as a result of the cortical lesions: the RS terminal, which rapidly becomes electron‐dense and later is phagocytosed, and the RL terminal, which initially exhibits signs of neurofilamentous hyperplasia and later becomes electron‐dense.Comparisons are made between the pulvinar and other thalamic nuclei with respect to synaptic organization and the origin of extrinsic synaptic terminals. It is pointed out that while the overall arrangements within the pulvinar are equivalent to those in VB, MGB or dLGN, the fact that two different populations of synaptic terminals originate in the cortex suggests functional differences between the pulvinar and other parts of the thalamus examined thus far. The possible phylogenetic origins of different parts of the pulvinar are also discussed.