Thus the brain could be viewed as a collection of tuned filters.
In 1962, Hubel and Wiesel were attempting to discover that triggered neurophysiological activity in a cat's brain.
This began a long series of discoveries which continues to the present day.
Hubel and Wiesel received the Nobel Prize for their discovery.
[2] Primate brains like our own display even more arcane forms of tuning, which are occasionally discovered by fMRI or PET scans of impaired patients.