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A major projection site of both nBOR and LM is the medial column of the inferior olive (IO), which provides climbing fibers to the vestibulocerebellum. This pathway has been well documented in pigeons, but not other birds. Recent works have highlighted that zebra finches show specializations with respect to optic flow processing, which may be reflected in the organization of optic flow pathways to the IO. In this study, we characterized the organization of these pathways in zebra finches. We found that the medial column consists of at least eight subnuclei (i\u2013viii) visible in Nissl\u2010stained tissue. Using anterograde traces we found that the projections from LM and nBOR to the IO were bilateral, but heavier to the ipsilateral side, and showed a complementary pattern: LM projected to subnucleus i, whereas nBOR projected to subnuclei ii and v. Using retrograde tracers, we found that these subnuclei (i, ii and v) projected to the vestibulocerebellum (folia IXcd and X), whereas the other subnuclei projected to IXab and the lateral margin of VII and VIII. The nBOR also projected ipsilaterally to the caudo\u2010medial dorsal lamella of the IO, which the retrograde experiments showed as projecting to the medial margin of VII and VIII. We compare these results with previous studies in other avian species.<\/jats:p>","DOI":"10.1002\/cne.25454","type":"journal-article","created":{"date-parts":[[2023,1,17]],"date-time":"2023-01-17T08:50:01Z","timestamp":1673945401000},"page":"640-662","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Topography of optic flow processing in olivo\u2010cerebellar pathways in zebra finches (\n                    <i>Taeniopygia guttata<\/i>\n                    )"],"prefix":"10.1002","volume":"531","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0782-1146","authenticated-orcid":false,"given":"Douglas R.","family":"Wylie","sequence":"first","affiliation":[{"name":"Department of Biological Sciences University of Alberta  Edmonton Alberta Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1909-7004","authenticated-orcid":false,"given":"Andrea 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