The third wave on a photopic ERG, associated with offset of the stimulus, is which wave?

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Multiple Choice

The third wave on a photopic ERG, associated with offset of the stimulus, is which wave?

Explanation:
Photopic ERG responses to a brief flash include an onset sequence and an offset response. The initial negative deflection comes from photoreceptors (a-wave), followed by a positive deflection from inner retinal cells (b-wave). When the light is turned off, the retina produces a distinct offset response, which under photopic conditions is known as the d-wave. The c-wave is a slower, sustained potential linked to the retinal pigment epithelium and is not the offset response for a brief flash. Therefore, the wave tied to stimulus offset is the d-wave.

Photopic ERG responses to a brief flash include an onset sequence and an offset response. The initial negative deflection comes from photoreceptors (a-wave), followed by a positive deflection from inner retinal cells (b-wave). When the light is turned off, the retina produces a distinct offset response, which under photopic conditions is known as the d-wave. The c-wave is a slower, sustained potential linked to the retinal pigment epithelium and is not the offset response for a brief flash. Therefore, the wave tied to stimulus offset is the d-wave.

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