Axon particle movement in motor neuron disease.
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Biomedical subjects
Publications and source records attributed to F H Norris.
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Until a definitive treatment is found for amyotrophic lateral sclerosis, there will continue to be a need to provide symptomatic care. Experience with caring for a large number of patients has proved that symptomatic therapy can be based on rational principles. Treatment should be limited to procedures that are simple and low-cost, with low risk of serious morbidity. When all remedies fail, the physician can still provide a comforting presence and foster a dignified death.
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Intercostal muscle end-plates were measured in patients with amyotrophic lateral sclerosis (ALS) and more benign motor neuron disease (MND). The length of the intact end-plates in ALS and MND was not different from the controls. Segmented end-plates were increased in both ALS and benign MND, and the end-plate length was greatest in ALS. In individual ALS cases, no correlation was found between the end-plate abnormalities and relevant clinical variables.
A patient suffered recurrent episodes of aseptic lymphocytic meningitis for many years and then developed amyotrophic lateral sclerosis (ALS). Immune-complexes were deposited in the renal glomerular basement membrane and mesangia. The necropsy study revealed both lymphocytic meningitis and ALS. Study of the motor neurons with the electron microscope revealed proliferation of endoplasmic reticulum, small cytoplasmolytic areas and focal neurofibrillar accumulations in axons. Interwoven, serpentine 10-15 nm. tubules first appeared with ER proliferation and, presumably at a later stage, were sometimes present in large masses. These tubules might be virus material but virus cultures, including tissue culture, and animal inoculations have thus far been negative.
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