[Changes of extracellular potassium concentration in the cortex and brain stem during the acute phase of experimental closed head injury (author's transl)].


The high concentration of extracellular potassium ((K+)o) impedes neuronal activity by depolarizing the membrane potential and further causing depolarization block or conduction block, and also causes swelling of astrocytes, which may result in narrowing of extracellular space and affect the diffusion of metabolites. Thus, when high concentration of… (More)