What cells are primarily responsible for the b-wave in an ERG?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Test your knowledge on photoreceptors. Use flashcards and multiple-choice questions, each with hints and explanations. Prepare for your test with confidence!

Multiple Choice

What cells are primarily responsible for the b-wave in an ERG?

Explanation:
In an ERG, the b-wave is the positive deflection that follows the initial a-wave and reflects activity in the inner retina. It arises chiefly from the depolarization of ON-bipolar cells when light reduces glutamate release from photoreceptors. This decrease in glutamate lets ON-bipolar cells respond by depolarizing, driving the larger positive wave we observe. Photoreceptors are the source of the a-wave, and the retinal pigment epithelium is linked to the c-wave, so those components aren’t responsible for the b-wave. Müller cells contribute to the retinal electrical environment but are not the primary generators of the b-wave.

In an ERG, the b-wave is the positive deflection that follows the initial a-wave and reflects activity in the inner retina. It arises chiefly from the depolarization of ON-bipolar cells when light reduces glutamate release from photoreceptors. This decrease in glutamate lets ON-bipolar cells respond by depolarizing, driving the larger positive wave we observe. Photoreceptors are the source of the a-wave, and the retinal pigment epithelium is linked to the c-wave, so those components aren’t responsible for the b-wave. Müller cells contribute to the retinal electrical environment but are not the primary generators of the b-wave.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy