Newman E A
Science. 1986 Jul 25;233(4762):453-4. doi: 10.1126/science.3726539.
The distribution of potassium conductance over the surface of freshly dissociated salamander astrocytes was determined by monitoring cell depolarizations evoked by focal increases in the extracellular potassium concentration. The specific potassium conductance of the endfoot processes of these cells was approximately tenfold higher than the conductance of other cell regions. This dramatically nonuniform conductance distribution may play an important role in the regulation of extracellular potassium levels by glia in the brain.
通过监测细胞外钾离子浓度局部升高所诱发的细胞去极化，确定了新鲜解离的蝾螈星形胶质细胞表面钾离子电导的分布。这些细胞终足突起的比钾离子电导比其他细胞区域的电导高约十倍。这种显著的非均匀电导分布可能在大脑中胶质细胞对细胞外钾离子水平的调节中起重要作用。
