Simple Cells a and B Have Receptive Fields at the Same

question 31

Multiple Choice

Simple cells A and B have receptive fields at the same location on the retina but have different preferred orientations, as shown by these orientation tuning curves: a preferred orientation of 90° for simple cell A and 75° for simple cell B. What happens when the receptive field location on the retina is illuminated by a bar of light oriented at 90°?

• A) When an electrode was advanced obliquely through the simple cell, its orientation tuning was determined by presenting bars of light with a specific orientation.
• B) When the receptive field location on the retina is illuminated by a bar of light oriented at 90°, the response of simple cell A is greater than the response of simple cell B.
• C) When the receptive field location is illuminated by a bar of light oriented less than 90°, the response of simple cell A is greater than the response of simple cell B.
• D) When a bar is oriented at 90°, it evokes, on average, a response of 40 spikes/sec above baseline.

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