Spatial-temporal interactions in the steady-state pattern electroretinogram

Salvatore Padovano, Benedetto Falsini, Pio Ciavarella, Giuseppe Moretti, Vittorio Porciatti

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

It is currently assumed that steady-state pattern electroretinograms can be obtained only at high rates of pattern reversal. However, steady-state responses can also be obtained at very low temporal frequencies (less than 1 Hz), provided that the reversal is sinusoidal. In five healthy volunteers, we studied the frequency characteristics of the pattern-reversal electroretinogram in response to sinusoidal gratings of 0.4 and 4 c/deg, reversed sinusoidally in contrast at frequencies ranging from 1 to 27 Hz. Steady-state responses dominated by the second harmonic component were obtained at all temporal frequencies tested; the amplitude of the second harmonic changed with stimulus temporal frequency. In the low-temporal-frequency range, stimuli of high spatial frequency appear to elicit larger contribution of generators with sustained or tonic characteristics compared with stimuli of low spatial frequency.

Original languageEnglish (US)
Pages (from-to)169-176
Number of pages8
JournalDocumenta Ophthalmologica
Volume90
Issue number2
DOIs
StatePublished - Feb 1 1995
Externally publishedYes

Keywords

  • Magnocellular system
  • Parvocellular system
  • Pattern Electroretinogram
  • Spatial frequency
  • Steady-state responses
  • Temporal frequency

ASJC Scopus subject areas

  • Ophthalmology

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