A previously unreported association of amyotrophic lateral sclerosis and ocular flutter is presented. It is hypothesized that initial loss of brainstem inhibitory interneurons resulted in disinhibition of burst interneurons and that the ocular flutter subsequently disappeared as burst interneurons also became affected by the disease process. The association adds clinical evidence of involvement of brainstem interneurons to other evidence of involvement of neurons other than motor neurons in the disease process.
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