CVRL Color & Vision Database -- A remarkable site containing a plethora of information concerning photoreceptors and color vision.
The Human Brain -- From the Virtual Hospital, this site shows dissections of the human brain and couples it with explanations of brain systems.
LSD -- A paper examining the historical origins of LSD and its chemical and biological properties.
Neurobics.com -- This web site is devoted to the science of neurobics (brain exercises) designed to improve memory and other aspects of brain function. You can order Lawrence C. Katz's book "Keep Your Brain Alive" at this site.
Neuroscience Tutorial -- From Washington U. School of Medicine, this site contains explanations of many basic aspects of nervous system structure and function.
Rodolfo Llinas' Home Page -- Home page of one of the scientists on the forefront of neuron function research. This site has links to many of his publications.
Schizophrenia -- National Institute of Mental Health fact sheet on schizophrenia.