Does anyone know if cerebral palsy and epilepsy can be related?

I have cerebral palsy and epilepsy, both of which have caused various other problems; like sciatica, arthritis, asthma, anxiety, hypersensitivity, occasional aphasia, sensory integration disorder, ADD, and dyscalculia. I have noticed that many adults with cerebral palsy whom I have talked to have epilepsy or some sort of seizure disorder, as well as one or more of the additional disorders mentioned. Are these two main disorders intertwined? Can anyone relate?