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DOI: 10.1055/s-2008-1054553
Muster- und Helligkeitselektroretinogramm bei Astverschlüssen der Arteria centralis retinae
Pattern and Brightness ERGs in Central Retinal Artery Branch OcclusionsPublication History
Publication Date:
11 February 2008 (online)
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Zusammenfassung
Bei zwei Patienten mit Astverschlüssen der Arteria centralis retinae wurde das ERG auf Muster- und Helligkeitsreize untersucht. Während das Hellig-keits-ERG weitgehend unauffällig war, zeigte das Muster-ERG bei zentraler Fixation eine Amplitudenverminderung und war bei vorwiegender Reizung der geschädigten Netzhautbezirke erloschen.
Summary
Electroretinographical responses to brightness (H-ERG, Ganzfeld illumination) and pattern reversal (M-ERG, illuminating an area of 20°) were recorded in two cases of occlusion of the temporal inferior branch of the retinal artery. While the H-ERG exhibited essentially normal responses, the M-ERG was markedly disturbed. With central fixation the amplitude of response to pattern was decreased by more than 50 percent. With peripheral fixation (14°) exposing most of the diseased part of the retina, the M-ERG was extinguished, whereas in the fellow eye pattern responses were present. The findings strongly support the notion that the M-ERG at least partly reflects the activity of retinal ganglion cells.