Next, the expression and association of Adcy2 in human patients and rodent models of neurodegenerative diseases (Alzheimer's disease and Parkinson's disease), psychiatric disorders (Tourette syndrome, schizophrenia, and bipolar disorder), and other neurological conditions (stress‐associated disorders, stroke, epilepsy, and Lesch‐Nyhan Syndrome) are elaborated. The gene discussed is ADCY2; the disease is neurodegenerative disease.