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The more aphasia is studied from the scientific point of view the more obvious it is that Hughlings Jackson's philosophical conceptions, presented more than fifty years ago, are sound in principle. He was the first to describe apraxia but did not give it a name. Liepmann in 1900 contributed considerably to this topic but divided apraxia into sensory and motor. He later modified this point of view. Pathologically, cases of apraxia have been reported as resulting from lesions in the callosum, gyrus supramarginalis, frontal lobe and parietal lobe. Sittig calls attention to the occurrence of truncal apraxia, which was quite pronounced in one of his cases, the patient often taking half an hour or more to lie down. He further reports a case in which the face and arms were but slightly apraxic, the legs more so, with the trunk mostly involved. The author discusses the localization of apraxia, which
Über Apraxie: Eine klinische Studie. JAMA. 1932;98(19):1683. doi:10.1001/jama.1932.02730450077042
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