Neural Adaptation

This is a demonstration of neural adaptation. When a neuron is continuously excited by a stimulus, its firing rate decreases after a while; this is called adaptation. But when you remove the stimulus, the neural adaptation affects your perception.  Here are two demonstrations of the effect.

Colour Adaptation
Stare at the red nose on the left for about 30 seconds. Then shift your gaze to the white panel. What do you see?

Motion Adaptation
Click on the image below and follow the instructions.