The Role of Melanin in Optical Tracks in Fetal Development

Avi: Can either you think of a type of disorder that might have this process disrupted? So if patients don't have melanin, there's a problem. Avi: Maybe albinism. Ramone Cajal developed a theory for why the central nervous system crosses the midline and visual tracks cross to revert inverted retinal images. And Cajal theorized that tactile sensory and motor tracks must also therefore cross.