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Erschienen in: Der Schmerz 1/2008

01.02.2008 | Übersichten

Kortikale Dysbalance des Migränikerhirns – Hyperexzitabilität als Folge einer Sensitisierung?

verfasst von: A. Stankewitz, PD Dr. A. May

Erschienen in: Der Schmerz | Sonderheft 1/2008

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Zusammenfassung

Eine kortikale Dysbalance spielt in der Pathophysiologie der Migräne eine zentrale Rolle. Zahlreiche elektrophysiologische Studien sowie Untersuchungen mittels transkranieller Magnetstimulation eruierten das Exzitabilitätsniveau von Migränikern im interiktualen Intervall. Repliziert wurde mehrfach, dass Migränepatienten unfähig sind, bei einer repetitiven Reizung eines Stimulus zu habituieren. In der aktuellen Literatur wird indes kontrovers diskutiert, ob dieses Defizit auf einem erniedrigten oder erhöhten neuronalen Präaktivierungslevel basiert. Vermutlich ist diese Debatte jedoch verfehlt. Vielmehr scheint eine Vielzahl externer und intrinsischer Faktoren die kortikale Exzitabilität sowie die Attackenfrequenz und -intensität zu beeinflussen. So ist ein Habituierungsdefizit nicht spezifisch für die Migräne und noch nicht einmal für Schmerz, dasselbe Phänomen findet sich u. a. bei Tinnituspatienten, sofern der Tinnitus chronisch ist. Vermutlich ist eine kortikale Hyperexzitabilität die Folge einer Chronifizierung und dem damit einhergehenden zentralen Sensitisierungsprozess.
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Metadaten
Titel
Kortikale Dysbalance des Migränikerhirns – Hyperexzitabilität als Folge einer Sensitisierung?
verfasst von
A. Stankewitz
PD Dr. A. May
Publikationsdatum
01.02.2008
Verlag
Springer-Verlag
Erschienen in
Der Schmerz / Ausgabe Sonderheft 1/2008
Print ISSN: 0932-433X
Elektronische ISSN: 1432-2129
DOI
https://doi.org/10.1007/s00482-007-0612-x

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