December 2002
Volume 43, Issue 13
Free
ARVO Annual Meeting Abstract  |   December 2002
Multifocal Electroretinogram Responses in Healthy Volunteers Before and After Voluntary Suppression
Author Affiliations & Notes
  • JM Klancnik
    Wills Eye Hospital Philadelphia PA
  • R Foroozan
    Wills Eye Hospital Philadelphia PA
  • MT S Tennant
    Wills Eye Hospital Philadelphia PA
  • EL Affel
    Wills Eye Hospital Philadelphia PA
  • C Jordan
    Wills Eye Hospital Philadelphia PA
  • TR Vrabec
    Wills Eye Hospital Philadelphia PA
  • Footnotes
    Commercial Relationships   J.M. Klancnik, None; R. Foroozan, None; M.T.S. Tennant, None; E.L. Affel, None; C. Jordan, None; T.R. Vrabec, None.
Investigative Ophthalmology & Visual Science December 2002, Vol.43, 1178. doi:
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    • Get Citation

      JM Klancnik, R Foroozan, MT S Tennant, EL Affel, C Jordan, TR Vrabec; Multifocal Electroretinogram Responses in Healthy Volunteers Before and After Voluntary Suppression . Invest. Ophthalmol. Vis. Sci. 2002;43(13):1178.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Abstract: : Purpose: To describe multifocal electroretinogram (MERG) responses in eleven eyes of six healthy persons who suppressed their MERG responses. Methods: MERGs were recorded with the test pattern in best focus. A second MERG was recorded after blurring the pattern. Several individuals augmented suppression with inattention and poor fixation. Amplitude and latency of first (fMERG) and second (sMERG) order kernal MERG responses before and after attempted suppression. Results: Suppressed MERGs demonstrated reduced amplitude of fMERG and sMERG responses. In addition, the latency of N1, P1 and N2 of the fMERG were progressively more shortened. The sMERG latencies were variable. Conclusion: MERG responses may be suppressed voluntarily. Amplitude may be reduced markedly in fMERG and sMERG. Implicit time may be shortened most notably in fMERG.

Keywords: 395 electroretinography: clinical • 393 electrophysiology: clinical 
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