Sugiyama M
Exp Brain Res. 1979 Aug 1;36(3):433-43. doi: 10.1007/BF00238514.
Following large lesions of the cat visual cortex, the distribution of degenerating terminal boutons in the Clare-Bishop area was studied electron microscopically. Degenerating boutons were found throughout the cortical layers but mostly in layer III (51% of the total number of degenerating boutons) and layer V (24%). A smaller number of boutons were found in layers II (12%) and IV (9%), and very few in layers VI (3%) and I (1%). No degenerating terminals were observed in the upper two-thirds of layer I. Seventy-six per cent of the total degenerating boutons terminated on dendritic spines, 22% on dendritic shafts, and 2% on somata. Some degenerating boutons made synaptic contacts with somata and dendrites of nonpyramidal neurons. For example, one degenerating bouton was observed in contact with an apical dendrite of a fusiform cell. Three examples of dendritic spines, with which degenerating boutons made synaptic contracts, were found to belong to spinous stallate cells. No degenerating boutons were observed making synaptic contacts with profiles that could conclusively be traced to pyramidal cell somata.
在猫视觉皮层出现大面积损伤后，运用电子显微镜研究了克莱尔 - 毕晓普区域内变性终末 boutons 的分布情况。在整个皮层各层均发现了变性 boutons，但主要集中在 III 层（占变性 boutons 总数的 51%）和 V 层（24%）。在 II 层（12%）和 IV 层（9%）发现的 boutons 数量较少，而在 VI 层（3%）和 I 层（1%）则极少。在 I 层上三分之二区域未观察到变性终末。变性 boutons 总数的 76%终止于树突棘，22%终止于树突干，2%终止于胞体。一些变性 boutons 与非锥体神经元的胞体和树突形成突触联系。例如，观察到一个变性 bouton 与一个梭形细胞的顶树突相接触。发现三个与变性 boutons 形成突触联系的树突棘属于棘状星状细胞。未观察到变性 boutons 与可明确追溯到锥体细胞胞体的结构形成突触联系。
