Which ERG wave represents the response from RPE cells?

Study for the NBEO Ocular Physiology Exam. Utilize flashcards and multiple-choice questions to enhance your learning. Prepare effectively for your certification!

The correct answer indicates that the C wave corresponds to the response from retinal pigment epithelium (RPE) cells during an electroretinogram (ERG).

In an ERG, multiple waves are recorded reflecting the electrical responses of different retinal cells to light stimuli. The A wave primarily represents the activity of photoreceptors (rods and cones) and the initial response from the inner retina. The B wave arises from the activation of bipolar cells and Müller cells, reflecting their activity in processing visual signals.

The C wave, however, is associated with the RPE and is believed to reflect the metabolic activity of these cells, particularly in response to an influx of ions and changes in the extracellular environment post-phototransduction. The RPE plays a crucial role in recycling retinal and supporting photoreceptor cells, hence its involvement in this regenerative wave.

The D wave, while also present in some ERG recordings, is generally related to a different aspect of retinal activity or a different type of response not directly linked to the RPE. Thus, understanding these cellular contributions helps clarify the physiological basis behind the associated waves in an ERG and solidifies the C wave's identification with RPE activity.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy