2 , the electron dense area ( eda ) consisting of the astrocytic process on one side and the neuron ( dendrite ) on the other side was observed in immune - electron - microscopic staining studies , and the eda was characterized with double layers thickening and dark staining cytomembranes with a narrow cleft between them ( 2 )免疫电镜观察, son内星形胶质细胞与神经元接触部位可以观察到膜增厚的结构? ?电子致密区( edas ) ,在神经元一侧可见cx32阳性金颗粒,而在星形胶质细胞一侧可见cx43阳性物质分布。