Cone and Rod Activity in the Electroretinogram Evoked by Double Flashes of Light
| Autor: | Valter Elenius |
|---|---|
| Rok vydání: | 1969 |
| Předmět: |
Adult
Light genetic structures Color Vision Defects Dark Adaptation Stimulus (physiology) Optics Electroretinography Reaction Time medicine Humans Photoreceptor Cells Short duration Physics business.industry High intensity Time constant Middle Aged eye diseases Ophthalmology medicine.anatomical_structure Amplitude ERG response Human eye sense organs business |
| Zdroj: | Archives of Ophthalmology. 81:618-621 |
| ISSN: | 0003-9950 |
| DOI: | 10.1001/archopht.1969.00990010620004 |
| Popis: | The electroretinogram (ERG) in the previously dark-adapted human eye evoked by double flashes of light of high intensity and short duration has shown after the first light stimulus a period of more than 500 msec of complete suppression of rod activity. During this period the second light flash evokes only cone components in the ERG. Regression lines calculated for the process of recovery of rod function from suppression indicate exponential recovery, the time constant of this process being 0.55 second. Time constant of the same order of magnitude was calculated both for the recovery of the a-wave and that of the total amplitude of the ERG response. However, the process of recovery of the a-wave begins and is completed some 200 msec earlier. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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