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Typus
Verschleierung
Bearbeiter
Hindemith
Gesichtet
Yes.png
Untersuchte Arbeit:
Seite: 5, Zeilen: 1-3, 5-15
Quelle: Gorji 2001
Seite(n): 34, Zeilen: l.col: 1-4, 7-23
Introduction

Spreading depression (SD) is a propagating wave of depolarisation associated by a depression of the neuronal bioelectrical activity for a period of minutes. [...] SD appears first at the stimulated site and spreads out in all directions at the velocity of 2–3 mm/min, so that increasingly distant areas undergo successively a similar temporary depression. A crucial manifestation of SD is a propagating negative potential with an amplitude of 10–30 mV and a duration of more than 0.5–1 min, which may be preceded or succeeded by a positive fluctuation of variable amplitude and duration. Underlying this cellular depolarisation is a dramatic change in the distribution of micromilieu ions between extra- and intracellular compartments. Potassium and proton release from the cells, while sodium, calcium and chloride enter together with water causing cells to swell and the volume of the extracellular compartment to be decreased. SD is accompanied by an increase of glucose utilization and O2 consumption. Recovery of SD depends on energy metabolism.

1. Introduction

Spreading depression (SD) is a self-propagating front of depolarization associated by a depression of the neuronal bioelectrical activity for a period of minutes. [...] It appears first at the stimulated site and spreads out in all directions at the velocity of 2-3 mm/min, so that increasingly distant areas undergo successively a similar temporary depression [243]. A necessary manifestation of SD is a propagating extracellular negative potential with an amplitude of 10-30 mV and a duration of more than 0.5-1 min, which may be preceded or succeeded by a positive deflection of variable amplitude and duration. Underlying this neuro-glial depolarization is a dramatic change in the distribution of ions between extra- and intracellular spaces. K+ and H+ release from the cells, while Na+, Ca2+ and Cl- enter together with water [152,166,222] causing cells to swell and the volume of the extracellular compartment to be reduced. SD is accompanied by an increase of glucose utilization and O2 consumption [47,283]. Recovery of SD depends on energy metabolism [47].


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(Hindemith) Schumann

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