A Square That Appears Light When Surrounded by a Black

question 8

Multiple Choice

A square that appears light when surrounded by a black border can be made to appear dark merely by increasing the brightness of the surround. This suggests that the visual cortex

• A) receives action potentials that convey information about luminance from the entire visual field.
• B) receives action potentials only from cells at the edges of the square.
• C) identifies the absolute levels of brightness in an image.
• D) responds to the periphery more than to the center of the visual field.
• E) receives information about color through the periphery of the visual field.

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