Most people think of the brain as being connected to the body by nerves.
They were the first to document how certain neurons within the hypothalamus of the brain convert the neural impulses of mind into the hormonal information substances of the body. The more general concept of information transduction in current day psychobiological theory apparently evolved from that point. Information transduction at this level usually refers to the conversion or transformation of information from one neuromolecular modality into another. The most familiar examples of information transduction come from the area of sensory-perceptual psychology. Information in one form of light is transduced into chemical information when it is encoded by the molecules of rhodopsin in the retina of the eye.