 The use of nanotechnology has opened up new possibilities for treating diseases in the central nervous system, CNS. Nanoparticle-based drug delivery systems can be designed to target specific areas within the brain, allowing for more precise dosages and reduced side effects. Additionally, these systems can be engineered to release drugs over time, providing a sustained effect. This technology holds great promise for the development of treatments for neurological disorders such as Alzheimer's and Parkinson's disease.