Pharmaceutical preparations and substances for the treatment of neurodevelopmental and neurodegenerative diseases and disorders, leukodystrophy, demyelinating diseases and disorders, and hypomyelinating diseases and disorders; Pharmaceutical preparations and substances for the treatment of glial fibrillary acidic protein-associated diseases and disorders, Alexander Disease, seizures, ataxia, motor function disorders, cognitive function disorders, dysphagia, and swallowing disorders; Pharmaceu...