Electroretinography
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High Quality Content by WIKIPEDIA articles! Electroretinography measures the electrical responses of various cell types in the retina, including the photoreceptors , inner retinal cells , and the ganglion cells. Electrodes are usually placed on the cornea and the skin near the eye, although it is possible to record the ERG from skin electrodes. During a recording, the patient's eyes are exposed to standardized stimuli and the resulting signal is displayed showing the time course of the signal's amplitude (voltage). Signals are very small, and typically are measured in microvolts or nanovolts. The ERG is composed of electrical potentials contributed by different cell types within the retina, and the stimulus conditions (flash or pattern stimulus, whether a background light is present, and the colors of the stimulus and background) can elicit stronger response from certain components. If a flash ERG is performed on a dark-adapted eye, the response is primarily from the rod system and flash ERGs performed on a light adapted eye will reflect the activity of the cone system.
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130847371
- Anzahl Seiten 80
- Genre Wärme- und Energietechnik
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Herausgeber Alphascript Publishing
- EAN 9786130847371
- Format Fachbuch
- Titel Electroretinography
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