Evidence from neuroscience, genetics and clinical investigation demonstrate that mental illnesses (e.g. anxiety, depression, insomnia, etc.) are diseases of the brain. Knowing how and where in the brain drugs work can aid the development of more targeted and potent medications that may help reduce unwanted side effects. In situ hybridization is one of the methods used to get an overview of brain regional pharmacology. This artifact was found at a brain section that had been exposed to a radioactive probe in an effort to find a new target for sleep pills. Since it resembles a face, the picture is produced as an Andy Warhol style portrait.