Theodor Ziehen

Georg Theodor Ziehen (12 November 1862 – 29 December 1950) was a German neurologist and psychiatrist born in Frankfurt am Main.

He was author of a textbook titled Die Geisteskrankheiten des Kindesalters (Mental Diseases of Childhood), a book that reportedly was the first systematic work on child psychiatry in Germany.

[2] Along with neurologist Hermann Oppenheim, the "Ziehen-Oppenheim syndrome" is named, a condition defined as genetic torsion dystonia (spasms) due to a lesion of the basal ganglia.

These contributions, which, to set the level of detail within them into perspective, amounted to approximately 700 pages on the cerebellum alone, appeared between 1899 and 1934 and were collected in two tomes published in 1903 and 1934, respectively, by the Gustav Fischer Verlag in Jena.

Among his other anatomical contributions was the coining of the term nucleus accumbens,[4] which he described in the brain of the common ringtail possum as part of his survey of the neuroanatomy of the marsupials and monotremes.