Table 1 - Etiologies of dysfunction above the brainstem


From the following article

Oral, pharyngeal and upper esophageal sphincter motility disorders

Benson T. Massey and Reza Shaker

GI Motility online (2006)

doi:10.1038/gimo19

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Ischemic 
Trauma 
Metabolic/degenerativeParkinson's disease
 Alzheimer's/other dementias
 Cerebral palsy
 Huntington's disease
 Wilson's disease
 Amyotrophic lateral sclerosis
 Tardive dyskinesia/torticollis
 Adrenoleukodystrophy
Infectious/inflammatory/immuneWhipple's disease
 Multiple sclerosis
 Infectious encephalitis/meningitis
 Lupus cerebritis
 Syphilis
 Diphtheria
NeoplasticPrimary brain
 Meningioma
 Metastases
Epilepsy 
IatrogenicRadiation
 Surgery
 Medication (sedatives, dopamine antagonists)