Newman E A
Ann N Y Acad Sci. 1986;481:273-86. doi: 10.1111/j.1749-6632.1986.tb27158.x.
Electrophysiological experiments, obtained primarily from dissociated salamander cells, demonstrate that the K+ conductance of Müller cells is distributed in a highly nonuniform manner over the cell surface. A large fraction of the total cell conductance is localized to that portion of the endfoot process that faces the vitreous humor. Along the remainder of the cell, specific K+ conductance is larger in the outer plexiform layer than in neighboring regions. High-endfoot conductance directs K+ spatial buffering currents preferentially through the endfoot process, leading to an efficient form of spatial buffering termed K+ siphoning. Preliminary experiments suggest that the endfeet of astrocytes also have high K+ conductance.
主要从分离的蝾螈细胞获得的电生理实验表明，米勒细胞的钾离子电导在细胞表面以高度不均匀的方式分布。细胞总电导的很大一部分位于面向玻璃体的终足突的那部分。沿着细胞的其余部分，外网状层的特定钾离子电导比相邻区域更大。高终足电导优先引导钾离子空间缓冲电流通过终足突，导致一种称为钾离子虹吸的高效空间缓冲形式。初步实验表明，星形胶质细胞的终足也具有高钾离子电导。
