Max Lewandowsky

Lewandowsky studied medicine at the Universities of Marburg, Berlin and Halle, earning his medical doctorate at Halle in 1898. In 1902 he obtained his post-graduate qualification for physiology, and in 1904, received training in clinical neurology and psychiatry under Karl Bonhoeffer and Franz Nissl at the University of Heidelberg. Afterwards he travelled to Paris, where he studied under neurologist Pierre Marie.[https://books.google.com/books?id=6ZAShqCwB0UC&dq=%22Max+Lewandowsky%22+1876&pg=PA448 Doing Medicine Together: Germany and Russia Between the Wars] by Susan Gross Solomon Beginning in 1905 he worked in the Berlin-Friedrichshain hospital.[https://books.google.com/books?id=IWkhAAAAQBAJ&dq=%22Max+Lewandowsky%22+Friedrichshain&pg=PA854 Deutschsprachige Neurologen und Psychiater: Ein biographisch] by Alma Kreuter During World War I he became infected with typhus and died.

Lewandowsky coined the term blood–brain barrier in 1900, referring to the hypothesized semipermeable membrane which separated the human central nervous system from the rest of the body's vasculature, and which prevented the entry of certain compounds from entering the brain when injected into the bloodstream.{{Cite journal |last1=Ribatti |first1=Domenico |last2=Nico |first2=Beatrice |last3=Crivellato |first3=Enrico |last4=Artico |first4=Marco |date=January 2006 |title=Development of the blood-brain barrier: A historical point of view |journal=The Anatomical Record Part B: The New Anatomist |volume=289B |issue=1 |pages=3–8 |doi=10.1002/ar.b.20087 |pmid=16437552 |issn=1552-4906|doi-access=free}} Two years earlier, researchers Arthur Biedl and R. Kraus had formed a similar hypothesis when low-concentration "bile salts" failed to affect behavior (and thus, in theory, had failed to enter the brain) when injected into the bloodstream of animals.{{Cite journal |last1=Biedl |first1=A |last2=Kraus |first2=R |date=1898 |title=Über eine bisher unbekannte toxische Wirkung der Gallensäure auf das Zentralnervensystem |journal=Zentralbl. Inn. Med 19 |pages=1185–1200}}

In 1908, Lewandowsky and Stadelmann published the first report of an individual with calculation impairment due to brain damage (acalculia; the term would later be introduced by Salomon Eberhard Henschen in 1925). The individual had trouble performing calculations on paper and mentally. Further, he had difficulty recognizing arithmetic symbols. The report was key in that it established calculation disorders as separate from language disorders, as the two were formerly associated.{{Cite journal |last1=Ardila |first1=Alfredo |last2=Rosselli |first2=Mónica |date=2002-12-01 |title=Acalculia and Dyscalculia |url=https://www.researchgate.net/publication/10939988 |journal=Neuropsychology Review |volume=12 |issue=4 |pages=179–231 |doi=10.1023/A:1021343508573 |pmid=12539968 |s2cid=2617160 |issn=1573-6660}}

Beginning in 1910 he, together with Alois Alzheimer, edited the journal Zeitschrift für die gesamte Neurologie und Psychiatrie. He was also editor of a handbook of neurology, {{Lang|de|Handbuch der Neurologie}} (1910–1914).

File:Lewandowsky Vogts Brodmann.JPG, Cécile Vogt-Mugnier, Oskar Vogt, Louise Bosse, Max Borcherdt and Max Lewandowsky.]]

• {{cite journal |last1=Holdorff |first1=B |year=2004 |title=Founding years of clinical neurology in Berlin until 1933 |journal=J Hist Neurosci |volume=13 |issue=3 |pages=223–38 |doi=10.1080/09647040490510524 |pmid=15370309 |s2cid=30362827}}

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Category:German neurologists

Category:1876 births

Category:1916 deaths

Category:19th-century German Jews

Category:Physicians from Berlin

Category:Physicians from the Province of Brandenburg

Category:University of Marburg alumni

Category:Humboldt University of Berlin alumni

Category:University of Halle alumni

Category:Deaths from typhus