- Duchenne muscular dystrophy
- Diaphragmatic paralysis
- Dermatomyositis
- Copper deficiency myeloneuropathy
- Congenital myasthenic syndrome
- Coma
- Cluster headache
- Chronic alcoholism
- Cervical spondylotic myelopathy
- Ceruloplasmin deficiency
- Cerebral palsy in children
- Cerebellar infarction
- Central nervous system diseases
- Brain ringing
- Bell's palsy
- Autoimmune encephalitis