✦ LIBER ✦

Effect of osmotic stress on potassium accumulation around glial cells and extracellular space volume in rat spinal cord slices

✍ Scribed by Lýdia Vargová; Alexandr Chvátal; Miroslava Anděrová; Šárka Kubinová; Drahomír Žiak; Eva Syková

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 262 KB
Volume: 65
Category: Article
ISSN: 0360-4012
DOI: 10.1002/jnr.1136

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✦ Synopsis

In rat brain and spinal cord slices, the local extracellular accumulation of K ϩ , as indicated by K ϩ tail currents (I tail ) after a depolarization step, is greater in the vicinity of oligodendrocytes than that of astrocytes. It has been suggested that this may reflect a smaller extracellular space (ECS) around oligodendrocytes compared to astrocytes [Chva ´tal et al. [1997]

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Glial depolarization evokes a larger potassium accumulation around oligodendrocytes than around astrocytes in gray matter of rat spinal cord slices

✍ Alexandr Chvátal; Miroslava Anděrová; Drahomír Žiak; Eva Syková 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 285 KB

The cell membrane of astrocytes and oligodendrocytes is almost exclusively permeable for K ؉ . Depolarizing and hyperpolarizing voltage steps produce in oligodendrocytes, but not in astrocytes, decaying passive currents followed by large tail currents (I tail ) after the offset of a voltage jump. Th