- vegetative state
- tremor
- referred pain
- fainting
- convulsions
- cerebral edema
- brainstem infarction
- brain death
- White matter demyelination
- Vestibular neuritis
- Sympathetic cervical spondylosis
- Sudden deafness
- Subacute sclerosing panencephalitis
- Subacute or chronic meningitis
- Spinocerebellar ataxia
- Spinal muscular atrophy