White E L, Rock M P
J Neurocytol. 1980 Oct;9(5):615-36. doi: 10.1007/BF01205029.
A Golgi-impregnated spiny stellate cell was selected from layer IV of SmI cortex in a mouse whose ipsilateral ventrobasal complex had been lesioned. The neuron was gold-toned, thin sectioned and then reconstructed in three dimensions using wooden sheets of appropriate thickness. These procedures enabled the numbers and distribution of thalamocortical and other synapses onto the reconstructed neuron to be determined. Results show the cell body to be roughly spherical and to receive 49 symmetrical synapses and four synapses which are intermediate between the asymmetrical and symmetrical type. A single, clearly asymmetrical axosomatic synapse is made by a degenerating, thalamocortical axon terminal. Five primary dendrites and their branches were reconstructed and, interestingly, these processes are distinctly elliptical in cross-section. The reconstructed dendrites receive 68 symmetrical synapses onto their shafts and 373 synapses onto spines of which 359 are asymmetrical and 14 symmetrical. Forty-eight, or about 13%, of the asymmetrical axospinous synapses are made by degenerating, thalamocortical axon terminals. An intriguing finding is that in many regions of the dendritic tree, two or more spines involved in thalamocortical synapses are attached to the dendritic shaft at intervals of 5 +/- 0.5 micron.
从一侧腹侧基底复合体已受损的小鼠的初级体感皮层（SmI）第IV层中选取了一个经高尔基染色的棘状星状细胞。该神经元被染成金色，制成薄切片，然后用适当厚度的木板进行三维重建。这些步骤使得能够确定丘脑皮质和其他突触在重建神经元上的数量和分布。结果显示，细胞体大致呈球形，接受49个对称突触和4个介于不对称和对称类型之间的突触。一个明显不对称的轴体突触由一个退化的丘脑皮质轴突终末形成。重建了5个初级树突及其分支，有趣的是，这些突起的横截面明显呈椭圆形。重建的树突在其轴上接受68个对称突触，在棘上接受373个突触，其中359个是不对称的，14个是对称的。48个（约13%）不对称轴棘突触由退化的丘脑皮质轴突终末形成。一个有趣的发现是，在树突树的许多区域，参与丘脑皮质突触的两个或更多棘以5±0.5微米的间隔附着在树突轴上。
