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Table 185-1

Sporadic Motor Neuron Diseases

ChronicEntity
Upper and lower motor neuronAmyotrophic lateral sclerosis
Predominantly upper motor neuronPrimary lateral sclerosis
Predominantly lower motor neuronMultifocal motor neuropathy with conduction block
Motor neuropathy with paraproteinemia or cancer
Motor predominant peripheral neuropathies
Other
Associated with other neurodegene­rative disorders
Secondary motor neuron disorders (see Table 185-2)
Acute
Poliomyelitis
Herpes zoster
Coxsackie virus
West Nile virus