Prolonged Exposure to Movement in One Direction ____________ the Motion

Multiple Choice

Prolonged exposure to movement in one direction ____________ the motion detectors sensitive to that direction. When the movement stops, the baseline firing rate of detectors for the opposite direction of motion will be ____________ than the firing rate for the detectors that responded to the prolonged movement, leading to motion after-effects.

A) activates; higher
B) activates; lower
C) fatigues; higher
D) fatigues; lower