It was 2:45 p.m., and my son, Cameron, and I were lost and already 15 minutes late for a birthday party for his 7-year-old friend. True to the male stereotype, I was bent on finding my way without ...

Directional selectivity is a response that is greater for a visual stimulus moving in one (PREF) direction than for the opposite (NULL) direction, and its computation in the vertebrate retina is a ...