This video shows how the response pattern of neurons in the CA1 region of the hippocampus in a mouse changed in response to cage shaking. The plot at right was generated by what is called multiple discriminant analysis (MDA), a pattern-recognition method.

The colored "bubbles" represent the signals recorded from the CA1 region by electrodes when the animal was in different states, such as resting (gray) or undergoing shaking (pink). As the movie runs, the initially resting animal undergoes the equivalent of an earthquake and returns to rest; meanwhile, the multicolored ribbon reflecting its CA1 activity at a particular moment jumps from the gray bubble to the pink one and back again.