Sensory maps and brain development the midbrain auditory nucleus had receptive fields independent of nature and intensity of the sound. Roger Sperry proposed a chemical gradient model for eye rotation and for neuronal wiring diagram. Retinal neurons and target cells had identification tags in the form of chemical gradients so that the projection of neurons would be orderly. For a topographic map of the visual world, the map first forms during neural development via molecular signals, such as chemospecific matching between molecular gradients. The molecular basis of sensory maps and brain development is a field that is being actively explored. The most recent work has
Pinky, Elmyra & the Brain sitcom "more like "The Simpsons"". In a press release, Warner Bros. stated that the new series was "a fresh approach to popular favorites as Pinky & The Brain move from ACME Labs to America's suburbs when they are adopted by the extremely excitable Elmyra." The idea was reportedly met with resistance from the producers of the series. The apparent dissatisfaction with Warner Bros.' decision to change "Pinky and the Brain" showed up in episodes. The last script that producer Peter Hastings wrote before leaving Warner Bros. for Disney was the episode "You'll Never Eat Food Pellets in This Town Again",