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During this time, the behavior of the animal may influence the survival or culling of these cells. In the songbird song system, earlier work suggested that adult-born neurons may be retained in the song motor pathway nucleus HVC with respect to motor progression toward a target song during juvenile song learning, seasonal song restructuring, and experimentally manipulated song variability. However, it is not known whether the quality of song per se, without progressive improvement, may also influence new neuron survival. To test this idea, we experimentally altered song acoustic structure by unilateral denervation of the syrinx, causing a poor quality song. We found no effect of aberrant song on numbers of new neurons in HVC, suggesting that song quality does not influence new neuron culling in this region. However, aberrant song resulted in the loss of left-side dominance in new neurons in the auditory region caudomedial nidopallium (NCM), and a bilateral decrease in new neurons in the basal ganglia nucleus Area X. Thus new neuron culling may be influenced by behavioral feedback in accordance with the function of new neurons within that region. We propose that studying the effects of singing behaviors on new neurons across multiple brain regions that differentially subserve singing may give rise to general rules underlying the regulation of new neuron survival across taxa and brain regions more broadly.<\/jats:p>","DOI":"10.1371\/journal.pone.0256709","type":"journal-article","created":{"date-parts":[[2021,8,31]],"date-time":"2021-08-31T14:05:46Z","timestamp":1630418746000},"page":"e0256709","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":5,"title":["Unilateral vocal nerve resection alters neurogenesis in the avian song system in a region-specific manner"],"prefix":"10.1371","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2042-448X","authenticated-orcid":true,"given":"Jake V.","family":"Aronowitz","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alice","family":"Perez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher","family":"O\u2019Brien","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Siaresh","family":"Aziz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5966-714X","authenticated-orcid":true,"given":"Erica","family":"Rodriguez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kobi","family":"Wasner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3821-2458","authenticated-orcid":true,"given":"Sissi","family":"Ribeiro","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dovounnae","family":"Green","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Farhana","family":"Faruk","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2006-0532","authenticated-orcid":true,"given":"Carolyn L.","family":"Pytte","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"340","published-online":{"date-parts":[[2021,8,31]]},"reference":[{"issue":"1","key":"pone.0256709.ref001","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1016\/j.cell.2005.04.028","article-title":"Retrospective birth dating of cells in humans","volume":"122","author":"KL Spalding","year":"2005","journal-title":"Cell"},{"issue":"9","key":"pone.0256709.ref002","doi-asserted-by":"crossref","first-page":"817","DOI":"10.1016\/j.exphem.2013.05.001","article-title":"Reticulocyte-based estimation of red blood cell lifespan","volume":"41","author":"W Krzyzanski","year":"2013","journal-title":"Exp Hematol"},{"key":"pone.0256709.ref003","doi-asserted-by":"crossref","first-page":"335","DOI":"10.1001\/archinte.1961.03620030023003","article-title":"\"Lifespan\" of liver cells. 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