The single-fiber EMG in the Lambert-Eaton myasthenic syndrome.
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Biomedical subjects
Publications and source records attributed to E L Hurwitz.
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This paper presents a content analysis of advertisements by chiropractors in the yellow pages. Information was gathered from 13 cities in the United States for the years 1985 and 1986. Results were categorized by size, number and content of the ads. Estimated expenditures for each city were calculated and a total cost for advertising for the entire chiropractic profession was estimated. Of the 5456 chiropractors listed in the yellow pages in this study, 14.7% bought additional space in the regular listing section, and 11.6% purchased large display advertisements. The remaining 73.7% listed only their name and telephone number. Of those who bought additional space, 10.8% advertised techniques, 11.6% symptoms, 14.7% injuries, 3% professional affiliations and 4% advertised free services. The average annual expenditure for the chiropractor was $2474.00. Future research needs to address the attitudes of the profession and patients toward advertising, and the cost-effectiveness of advertising. The value of the distribution of resources for advertising by chiropractors is questioned.
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The sequence of events in focal cerebral ischemia has been difficult to study quantitatively in humans. Experimental investigation of these phenomena has been impeded because reproducible animals models that simulate human stroke are lacking. We have developed a rabbit spinal cord ischemia model that resembles human stroke patterns in many respects. Using this model, we have found that (1) brief ischemia produces completely reversible neurological deficits; (2) intermediate ischemic periods may produce transiently reversible deficits that later progress without further manipulation; (3) prolonged ischemia produces irreversible lesions in all animals. The model should be useful for studies of the pathophysiological mechanisms of CNS ischemia.