Article (Scientific journals)
The neural distribution of the avian homologue of oxytocin, mesotocin, in two songbird species, the zebra finch and the canary: A potential role in song perception and production.
Haakenson, Chelsea M; Balthazart, Jacques; Madison, Farrah N et al.
2022In Journal of Comparative Neurology, 530 (13), p. 2402 - 2414
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Keywords :
neuroanatomy; nonapeptide; social behavior; songbird; mesotocin; Oxytocin; Animals; Brain/anatomy & histology; Canaries; Female; Male; Oxytocin/analogs & derivatives; Perception; Vocalization, Animal; Finches/anatomy & histology; Songbirds; Brain; Finches; Neuroscience (all); General Neuroscience
Abstract :
[en] The avian homologue of oxytocin (OT), formerly called mesotocin, influences social behaviors in songbirds and potentially song production. We sought to characterize the distribution of OT peptide in the brain of two songbird species: canaries (Serinus canaria) and zebra finches (Taeniopygia guttata). To visualize OT, we performed immunocytochemistry using an antibody previously shown to identify OT in avian species. In both canaries and zebra finches, dense OT-ir perikarya were located in the paraventricular nucleus (PVN), preoptic area (POA), supraoptic nucleus (SON), and medial bed nucleus of the stria terminalis (BNSTm). We also observed morphologically distinct OT-ir cells scattered throughout the mesopallium. OT-ir fibers were observed in the PVN, ventral medial hypothalamus (VMH), periaqueductal gray (PAG), intercollicular nucleus (ICo), and ventral tegmental area (VTA). We also observed punctate OT-ir fibers in the song control nucleus HVC. In both male and female canaries, OT-ir fibers were present in the lateral septum (LS), but innervation was greater in males. We did not observe this sex difference in zebra finches. Much of the OT staining observed is consistent with general distributions within the vertebrate hypothalamus, indicating a possible conserved function. However, some extra-hypothalamic distributions, such as perikarya in the mesopallium, may be specific to songbirds and play a role in song perception and production. The presence of OT-ir fibers in HVC and song control nuclei projecting dopaminergic regions provides anatomical evidence in support of the idea that OT can influence singing behavior-either directly via HVC or indirectly via the PAG, VTA, or POA.
Disciplines :
Zoology
Author, co-author :
Haakenson, Chelsea M ;  Program in Neuroscience and Cognitive Science, Department of Psychology, University of Maryland, College Park, Maryland, USA
Balthazart, Jacques  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques
Madison, Farrah N;  Program in Neuroscience and Cognitive Science, Department of Psychology, University of Maryland, College Park, Maryland, USA ; Department of Biology, Hope College, Holland, Michigan, USA
Ball, Gregory F;  Program in Neuroscience and Cognitive Science, Department of Psychology, University of Maryland, College Park, Maryland, USA
Language :
English
Title :
The neural distribution of the avian homologue of oxytocin, mesotocin, in two songbird species, the zebra finch and the canary: A potential role in song perception and production.
Publication date :
September 2022
Journal title :
Journal of Comparative Neurology
ISSN :
0021-9967
eISSN :
1096-9861
Publisher :
John Wiley and Sons Inc, United States
Volume :
530
Issue :
13
Pages :
2402 - 2414
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
NINDS - National Institute of Neurological Disorders and Stroke
Funding text :
We acknowledge the Imaging Core Facility in the department of Cell Biology and Molecular Genetics at the University of Maryland, College Park for use of the Nikon Eclipse microscope and software. This work was supported by NINDS 1 R01 NS104008‐01.
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since 29 November 2024

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