<unk>  <unk>  is a medical condition. It belongs to a group of disorders known as motor neuron diseases.<unk>  is a disease that attacks the nerves supplying the<unk>  muscles. These disorders are characterized by the degeneration of motor neurons in the cerebral cortex, spinal cord, brain stem, and pyramidal tracts. This specifically involves the glossopharyngeal nerve (IX), vagus nerve (X), and hypoglossal nerve (XII). This disorder should not be confused with pseudobulbar<unk>  or progressive spinal muscular atrophy. The term infantile<unk>  is used to describe<unk>  in children. The ICD-11 lists<unk>  as a variant of amyotrophic lateral sclerosis (ALS).
Progressive bulbar palsy
Progressive muscular atrophy
Facial onset sensory and motor neuropathy
Dissociated sensory loss
Multifocal motor neuropathy
Chronic progressive external ophthalmoplegia
Periodic paralysis
Subacute myelo-optic neuropathy