The goal of this clinical trial is to learn if sensor-based robotic upper limb rehabilitation can improve cognitive and motor functions in adults with neurological and neurodegenerative disorders, including Parkinson's disease, multiple sclerosis, and stroke. The main questions it aims to answer are: Does sensor-based robotic rehabilitation improve cognitive functions such as attention, memory, and executive functions? Does this rehabilitation lead to better motor recovery and daily functioning compared to conventional therapy? Researchers will compare the experimental group receiving robotic rehabilitation with cognitive tasks to the control group receiving conventional therapy to see if the robotic approach leads to greater improvements in both cognitive and motor outcomes. Participants will: Receive upper limb rehabilitation using robotic devices and virtual reality-based exercises or conventional therapy Complete a series of neuropsychological assessments before and after the intervention to measure cognitive changes Complete motor function tests before and after the intervention to evaluate physical improvements Participate in 25 training sessions, 2-3 times per week, each lasting 60 minutes