HVC (avian brain region)

HVC (formerly, hyperstriatum ventrale, pars caudalis (HVc), and high vocal center) is a nucleus in the brain of the songbirds (order passeriformes) necessary for both the learning and the production of bird song. It is located in the lateral caudal nidopallium and has projections to both the direct and the anterior forebrain pathways.

The HVC in the context of the song-learning pathway in birds.[1]

It is notable that both of the other orders of birds that learn song, the hummingbirds and parrots, also seem to have structures similar to HVC. Since it is believed that all three of these groups independently derived the ability to learn song, it is believed that these other HVC-like structures are examples of homoplasy.

Name

HVC was originally called the hyperstriatum ventrale, pars caudalis (HVc).[2] Later neuroanatomy revealed this name to be incorrect, however, and many researchers referred to it as the high vocal center due to its important function in vocal learning. When the nomenclature of the avian brain was officially revised in 2004,[3] these names were officially dropped in order to correct the historical inaccuracies. As there was "No easy solution for correcting original naming error for this structure"[4] HVC was established as the formal name for the region and no longer stands for anything.[5][6]

Anatomy

HVC is located in the caudal nidopallium. It projects to the song motor pathway via the robust nucleus of the arcopallium (RA) and to the Anterior Forebrain Pathway via the basal ganglia nucleus Area X.[1] It receives recurrent motor activity through the thalamic nucleus Uvaformis (Uva) and input from the auditory system through projections from the caudalateral mesopallium (CMM) and through the nucleus interfacialis (NIf).[7] Three distinct types of neurons have been identified in HVC, each with unique anatomical and physiological properties: interneurons, RA-projecting cells (HVCRA), and X-projecting cells (HVCX)[7]

See also

References
  1. Nottebohm, F. (2005). "The Neural Basis of Birdsong". PLoS Biology. 3 (5): e164. doi:10.1371/journal.pbio.0030164. PMC 1110917. PMID 15884976.
  2. Nottebohm, F.; Arnold, A. (1976). "Sexual dimorphism in vocal control areas of the songbird brain". Science. 194 (4261): 211–213. doi:10.1126/science.959852. PMID 959852.
  3. Reiner, A.; Perkel, D. J.; Mello, C. V.; Jarvis, E. D. (2004). "Songbirds and the Revised Avian Brain Nomenclature". Annals of the New York Academy of Sciences. 1016: 77–108. doi:10.1196/annals.1298.013. PMC 2481519. PMID 15313771.
  4. "Table 4. New Terminology for Neostriatum". 20 Aug 2012.
  5. Naguib, M.; Riebel, K. (2006). "Birdsong: a Key Model in Animal Communication". Encyclopedia of Language: 40–53. doi:10.1016/B0-08-044854-2/00830-0. ISBN 9780080448541.
  6. http://www.avianenrichment.com/mental_brainpower.htm
  7. Mooney, R. (2009). "Neurobiology of song learning". Current Opinion in Neurobiology. 19 (6): 654–660. doi:10.1016/j.conb.2009.10.004. PMC 5066577. PMID 19892546.
  • High+Vocal+Center at the US National Library of Medicine Medical Subject Headings (MeSH)
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.