These include a wide variety of injuries and medical disorders that affect the central nervous system. They include epilepsy, stroke, Parkinson's syndrome, cerebral palsy, amyotrophic lateral sclerosis (Lou Gehrig's disease), polio, myasthenia gravis, peripheral neuropathy, reflex sympathetic dystrophy, cerebral trauma, syringomyelia, various spinal cord or nerve root lesions, Huntington's chorea, Friedreich's ataxia and other degenerative disorders.  

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 and communicating. Others have impaired balance or can't operate various kinds of machinery.   Still others have limited stamina, or they have 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 physical examinations. The absence of such results and findings makes it difficult to establish a claim of disability based on such a disorder. 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.