Neuronal disorders, e.g., epilepsy, episodic ataxia, familial hemiplegic migraine, Lambert-Eaton myasthenic syndrome, Alzheimer's disease, Parkinson's disease, schizophrenia, hyperekplexia may result from dysfunction of voltage-gated sodium, potassium and calcium channels, or acetylcholine- and glycine-gated channels.
Yes! My son suffers from an ultra-rare neurological disease (presently) called AHC. It results from mutation in ATP1A3 a critical sodium/potassium pump in the brain.