These include a wide
variety of injuries and medical disorders that affect the central
nervous system. They include epilepsy, stroke, Parkinsonian
syndrome, cerebral palsy, spinal cord or nerve root injuries, multiple sclerosis, amyotrophic lateral sclerosis (Lou
Gehrig's disease), myasthenia gravis, muscular dystrophy, peripheral neuropathies,
chronic brain syndrome, cerebral trauma, syringomyelia, and various degenerative disorders including Huntington's chorea, Friedreich's ataxia, inclusion body myositis and innumerable others.
The limitations produced by these impairments are quite varied. Individuals with neurological disorders often have difficulty using one or more of their hands and feet for repetitive activities. Some have difficulty seeing, communicating, swallowing or breathing. Others have impaired balance or can't operate various kinds of machinery. Still others have impaired mentation and difficulty dealing with the mental demands of work.
Most neurological disorders can be objectively
documented by laboratory test results and by the presence of
characteristic findings on examination. The
absence of such results and findings makes it difficult to establish
a claim of disability based on such disorders. Where
the requisite findings are present, the nature and degree of
the limitations resulting from the disorder generally determine
whether or not disability benefits will be granted.